Great headwind putter. I was using the socibomb slammer but recently switched to the sinus for headwind putts. I feel it fights the wind but doesn't feel like you're tossing a brick at the basket like the slammer. It also has unique grip pads on the face of the disc. These grip pads may take some getting use to as I've never encountered them before. I found myself looking down to properly adjust my thumb to the pad on every putt. Overall great headwind putter, could probably work for approach shots as well 

This is my go to stable driving/approach putter. I have it in Zero Hard, Medium and Soft. It has more glide than advertised and does well in the wind. I would compare it favorably to the Harp, giving the edge to the Sinus on backhands and to the Harp on forehands. Also good for headwind putts. 

There are a couple of unusual things about this disc. First, and most obviously, are the touch pads on top of the disc. I like them but they might not be for everybody. Second, the bottom edge of the disc is somewhat sharp with the Hard plastic.

It's thin and flat so if you have skinny fingers like me, this disc might fit better in your hand than something like a Pig or Caltrop. 

Being a relatively new disc golf player, I did not understand the concept of throwing the putter until I picked up the Sinus. The grip on the disc is very comfortable and the flight is consistently overstable, perfect for an approach putter. For a beginner, this disc is a good way to develop an understanding of throwing putters, and professional player have vouched for this disc, including David Feldberg. I reccomend this disc to anyone that wants to improve their approach game, forehand or backhand.

I putt hard and fast, always have, always will.  That's why I like the Sinus.  The low glide compensates for my putt speed when I miss, so I don't miss by too much, and helps keep my shots on target away from the top of the basket.  It never lifts in the headwind, and a nice nose down shot will still get carried like any other disc in a tailwind.  The funky little track pads on the top may not be for everyone, myself included, but I must admit, they come in handy on rainy days where my normal grip is compromised.  Off the box, this disc is reliable and straight with minimal fade and no turnover, and works well for a variety of sub 300 shots.  Only real downside is right off the get go, the bottom of the rim is pretty sharp.  I wound up taking mine (zero hard) and rubbing it on the sidewalk for a couple minutes to smooth it up.  All in all, a keeper in my bag for sure.

The Sinus is great for what the numbers want it to be. If you need a stable putting putter, I would definitely give it a shot. If you want a stable throwing putter, I would probably look elsewhere. Between the stability, speed, and low glide, it is hard to get any distance out of the Sinus when you could try a Slammer or Harp. Once it runs out of speed, is just dumps to the ground, and it's not a very fast disc. It served me pretty well for aproaches, but wanting to minimize my molds, I wanted something more out of my overstable throwing putter.

The Sinus is a very different feeling disc and the name really blows.  Although, you do get to say things like, "Before you putt, let me clear my Sinus."

It has three thumb pads on the top of the flight plate which are slightly raised and have a rough texture to them to help with grip.  If you don't like how they feel, there is plenty of smooth area where you can put your thumb.  In fact, most of the flight plate is smooth with three slightly more than thumb-sized (depending on the size of your thumb I suppose) rough pads.  I like the texture and grip of the pads but I've heard that other people don't.  

The bottom edge is sharp.  Technically, this may be a beadless putter or maybe it's a macro-bead where the whole bottom half of the rim is the bead.  Regardless, the bottom edge is sharp.  I say that twice because I very much tend to shy away from beaded discs (I have used all of my Sinuses enough to dull that sharp edge a bit).  However...

I love this disc.  This is my driving/approach/headwind-putter disc.  All of mine are Zero Hard and while they are getting beat in, they still aren't beat in to the point where the disc turns over when I throw it.  It holds a nice straight line for most of its flight before fading out.  It sticks where it lands, probably because of the aforementioned sharp edge.  You might get some slide if you land on hard-pack but if you hit grass, where it hits is your new lie.  If I need to play a skip or slide shot, I do not use the Sinus.  If I'm within 200 feet and want a reliable disc that will fly where I tell it to fly and sit where I tell it to sit (Sit Ubu, sit!), then I use the Sinus.

It's much more stable and has less glide than my go-to putter, the Sarek, so I use the Sinus for headwind putts, even if it's just a slight headwind.  Sometimes I get lazy and my putts get a little nose-up and floaty, which is not what you want to do in a headwind, and the Sinus helps compensate for my lack of focus.

Bag-worthiness: After everything I've written, there isn't a lot of suspense here.  I always have at least one in my bag (two if I think there is any way that I might lose one such as playing a course with a lot of water).  This disc is one of my must-have discs regardless of how I might change my bag configuration to meet the requirements of individual courses (possibly like many people feel about a Roc or EMac Truth).

I love this disc. I do not really putt with this disc unless I am in a headwind, but I definitely use this as my throwing putter. Any hole that is under 300 ft, I will definitely use this disc. I actually just got my first ace about a week ago with this disc. You can really throw this putter a long ways and can fight through a lot of wind. I don't use this putter as my main putting putter because I stick to a Judge or Pure. Nothing wrong with putting with this disc, my buddy loves to putt with it. If you're looking for a throwing putter, I'd give the Sinus a try.

I just picked up a Sinus (Or See-nus as Feldberg pronounces it) to try to fill my ever elusive OS putter slot. At first glance, the Sinus is strange with the 3 thumb pads on the top and with a very sharp flashing. I was kind of thinking "eh" when I first opened the package and felt it up when my infinite package arrived.

I took it out today for the first round and first toss I hit the cage from 80 feet out on a flick approach I bent around some trees. Second shot? Threw it off the tee and parked it 5 feet from the basket. 150 foot approach in a field with wind coming off the water? Parked that too. The latin on the stamp roughly translates to "Will not be touched by wind" and it's certainly OS enough to not get bullied by a headwind. 

It is just the right amount of OS in that the Zero Hard isn't oppressingly OS out of the hand like a Z Zone and will carry straight with a dependable bite at the end. It is exactly what I wanted from my OS approach putter. I'm rather pleased with it- it made an excellent first impression.

We'll see how the plastic beats in. In the meantime, when my paycheck clears I'll be ordering another few Sinus' just in case. I think I'm going to hitch myself to the Sinus wagon.

BT Hard 175g. I wanted to like this disc as a trilogy fan, but just couldn't. It feels big, bulky and awkward. Furthermore, the bottom of the rim was very sharp and felt like it was cutting my hand. I also felt I was very inconsistent with it, which shouldn't be the case for an os approach disc. I definitely prefer the zone and/or suspect to this disc.

Profile: It has the oddest rim of any putter on the market.  The top of the disc has 3 spots with a different grip (kind of a sandpaper type feel).  Very sharp line at the bottom too.

Flight: Stable putter: Holds a straight line with a reliable fade at the end.

Comparison: Harp

Final Thoughts:  I think this disc is going to die out.  This is only for throwing you wouldn't want this a putting putter.  The biggest problem with this disc is the Harp is better in the role, it has a more normal feel in the hand and is much more consistent.  If you are looking for a stable putter in the Trilogy family get a harp and pass on this one.  I will say this, it does fly as advertised just too weird of a disc for me.

I got the Sinus while searching for a stable up-shot and driving putter. After hearing a lot of good things, and having many recommend it, I had to pick one up. I normally carry a somewhat neutral driving putter (currently a Fuzion Judge) and the Sinus compliments it very well. The Sinus does have a unique feel; three grip areas with varying textures (which I ignore completely) and a rather sharp bottom edge which can feel strange at first and potentially effect the release. These qualities don't deter me at all, as I am kind of indifferent to them, but I could see either feature being annoying to some. 

The Sinus is a stable (but not overstable) putter. I consider it purely a driving putter. The Sinus feels too different in my hand to use next to my putting putters. Although, if that isn't an issue for you, I could see this working well in headwinds for longer putts. 

This isn't a huge distance driving putter for me. I outdrive it with many of my other putters: Judge, Shield, Warden, Macana, etc. That being said, the Sinus provides me with a lot more stability and it settles really quickly and consistently. When field testing it alongside other discs, the Sinus really excelled at placement shots and sticking near the basket. From my awkward range (approximately 80' - 140') the Sinus outperformed all of my other discs, leaving me close to the basket every time. I'm sure as I gain more arm speed, this disc's stability will also allow me to get some good distance. 

This is a disc that has a lot of uses: it is great in the wind, has a reliable fade, and its shape and flight allow it to settle predictably. The Sinus will be good off the tee and for up-shots. It is a somewhat stable disc, so beginners might not find it that easy to throw. I have a VIP Harp that is much more stable, I think a Harp in the BT plastic line may be similar to the Sinus. I really recommend this disc if you are looking for an awesome stable driving putter.

Ever had a putter slip out on the release? You will love the Kung Fu thumb grip treads.

The zero line consistenly flies straight for 10M short putts. Slight hyzer at longer distances.

The Sinus is my flagship putter, and always carry at least one in my bag. I usually have one of each - soft, meduim and hard and break out each pending on distance for the putt. The hard plastic is exceptional as a mid range disc as well. 

The Sinus is an awesome short range driving, approach and utility disc!!!  It's def not ment to be a putter (except maybe in the gnarliest of headwinds).  It has a little more midrange type of finish/ hyzer. I love this about the Sinus!  It's more pin point accurate.  It's flatter and not as deep as my throwing KC Aviars.  So, it feels more confortable to rip on hard (and you def have to make sure you throw this disc with enough power to fly). You can't turn it over unless you start it that way out of your hand and even then it will fight back as long as it has some air under it.  It's great for short sidearm approaches, short straight to hyzer drives or short hyzers. I started messing with the Sinus after my champ rhynos were ticking me off.. It's they have replaced them them the Rhyno in my bag.  I mainly use it for 200ft-270ft straight to hyzer or hyzer shots (esp when I don't want to go too far).  I like the Zero Hard Plastic because on the consistant release.  The Zero Hard Plastic works in and wears.  So, the Sinus will eventually hold straight for a little while before hyzering and dropping.

Highly recommend disc for advanced to pro level players!

This is an amazing disc. When I took this out for the first time and let it rip, it flew pretty much like a 'Wasp' but with a bit shorter flight path. If thrown hard and flat at about 8 feet off of the ground it will fly straight for about 260' then fade off left pretty hard ending in about a 280-300 ft drive. I would say it travels about 50' past what the flight chart shows, with a bit less fade... if you really give it all you've got. Now when using it in the 100' to 200' foot range, I just popped it out on a hyzer and it held the line beautifully right to the basket. Truly a great stable putter for a fan of overstable discs.