The A4 is a fantastic approach disc. Depending on the plastic you get it in, its stability ranges anywhere from dead laser straight to OS but never beefy. Generally the higher number the plastic the more OS it is. The lowest numbered plastics (200, 300) are a base plastic and also beat in pretty quickly and become US with enough time and throws. The disc has a bit of a different feel, but I've always loved the way it sits in my hand. Generally speaking, the A4 has an amazing balance of speed, glide, and stability. This makes it easy to range and predictable while also netting decent distance in a wide variety of situations. It's great for backhand and forehand alike. IMO there really isn't a better 4 speed approach disc out there, although many discs could make an argument they're just as good.

Became one of my go to backhand discs off the tee. Mostly on shots in the 250-300 feet range. The two I throw are 400 and 750 plastic, both pretty stiff, and I can throw them aggressively without worrying about any turn and burn. With just a touch of hyzer they both pop up and ride straight until the moderate dump at 250-300'. With more hyzer I can place some pretty accurate shots that need to finish left. 

The rim might not be for everybody but I find it way easier and comfortable to throw power shots than the traditional putter shapes. Applies to both backhand and forehand shots. It covers the distance I throw midranges so I barely have any in my bag anymore. 

The A4 is one of my favorite approach and short distance discs in my bag. I have an A3 and A4 both in 400 plastic, and they are so unique. I use them as approach discs and as overstable mid ranges.

They both have that unique very thin shape, with the unique blunt squared off leading edge and thin rim. It makes holding the disc and throwing it so much easier to come out of your hand. Hence, why it’s SO good for approaches as it’s almost impossible to pull or yank it from getting stuck in your hand. And they work SO well on FH’s as well. The 400 plastic on these is semi opaque, not see thru. And is medium flex/stiffness. Not as flexible as a normal see thru 400, but not as stiff as a 750. And they also start forming this strange chalky residue all over them after a year or so. It’s good and bad. It’s good in that it helps you get a better grip on the disc when it’s warm out. But bad in that it looks like your disc is covered in finger prints and baby powder. Also, the plastic is very durable and is holding up really well. No major dings or nicks after 2 seasons of play.

My A4 is slightly domey, but closer to flat, whereas my A3 is more domey. They are both max weight and both are what I would call overstable to very overstable. The A4 goes straight for about half the flight, then starts fading left somewhat hard. While the A3 is a meat hook and almost instantly starts turning left. It’s also not as long as the A4. I consistently get 20-40’ more distance from the A4. I’d say they fit in between a putter and a mid range, as far as distance goes. I’d say my A4 is a 4/3.5/0/3.5 while the A4 is a 4/2/0/4 ish.

Both of these discs are very unique in their shape, but now that everyone else is making an “Approach” disc, they aren’t that unique in what they accomplish. When they first came out, there weren’t that many discs like it. Now every company has at least one overstable low glide approach disc. But it’s still one of my favorites and always carry at least one or both even with other approach discs in and out of my bag (I switch in and out the A3, a Tactic and the new Jarn). One thing I like about the A4, that my Tactic or Jarn don’t do quite as well is skip once hitting the ground. I can put this thing on a hyzer angle out right and rip on it, and know that it’s not only going to get back left, but once it hits the ground, it’s going to skip and spin back left even more. There have been a few shots where I was thinking I had TOTALLY biffed the shot by putting it so far out right. Only to have it hit the ground, take a big skip left, then spin even more left and almost backwards at the end and be RIGHT by the basket! And once I started figuring that out, I can now use it for SUPER sharp dog leg lefts, where the basket is tucked behind trees or an obstacle that is almost impossible to get close too. Throw it out right on a hyzer angle and it will hit the ground and skip and then roll left and get so close. Not many other discs can do that. Such a nice disc to just throw it and forget about it on approaches. Just aim out right, throw it, and start walking up to your tap in putt. Also handles wind very well.

Fantastic approach/short mid range disc and highly recommend it!