Quake in D-line is not as OS as my Pro Line which is quite OS even after years of use.  But the D-line is OS enough to be reliable, glides well, feels great, you can cycle it from OS to US and it is probably the best bargain in disc golf.  Besides the low price, the bargain lies in how all Quakes fly.  They have the same flight shape at all power levels... a flight shape I can only describe as "buttery smooth fade".  Powered-down or over-powered they are straight to fade and fade the same amount every time.  This makes them super easy to range and easy to trust at any distance of throw.  The Quake in D-line is easily my favorite mid-range of all time.

I'm a primarily forehand player, coming from a background in ultimate. I picked up a Quake when I was searching for an overstable midrange, and it ended up being perfect. It has a perfectly flat top and low profile for forehanding, and can easily handle the torque. This is the disc that my friends are always curious about after they me throw.

I actually have this in Pro line and Jawbreaker or whatever they call it. In pro line, this is a somewhat overstable midrange. It is like a beat in buzzz OS. Feels good, flies really good and has a nice finish. In Jawbreaker, it's a fairly straight disc. If these were readily available in more plastic types, or if you are sponsored by DGA, I recommend it highly for the overstable midrange slot. 

I carry a D-Line and a premium plastic glow blend.

The Quake is a comfortable mod with no need yet very stable/overstable.

D-Line beats into a straight flyer.

Premium is more OS and can handle decent torque both FH and BH. 

If you like beadless stable to overstable mods with a flat top, this is for u!

*** THIS REVIEW IS FOR THE CONCRETE PLASTIC ***

Flight: Backhand - High speed turn resistant with dependable fade at low speed. Thrown flat it will start to hook up about half way through flight. Put some anhyzer snap and it'll fly straight for a long time and then have some forward pushing fade

Feel: soft flight plate with stiff rim. Good grip with smooth texture. Durability is in line with a high end base plastic 

Speed 5

Glode 4 (probably due to plastic type)

Turn 0

Fade 3