The PRS is a nice stock, I have one for my AR-10T. The manufacture quality is top notch and is very simple to replace if you're changing it out from an A2 stock.
Things I've noticed:
-LOP adjustment of 1" seems to be enough. I used it to transitioning from a bench to prone.
-It weighs quite a bit more than an A2. This can be a good thing if you have a heavy bbl target rifle, to help balance it out.
-If you like to use the sling attachment on an A2 stock as a buttstock hook, this feels way different. I have no idea if it's better or worse, it is just a different feel. I know that I liked to lay my left hand on my bicep which cradled the stock. Now with this new shape, that's almost impossible. I need to give it time in order to adjust.
-The hourglass shape to the butt seems to fit nicely and should facilitate better repeatability.
-The PRS stock feels way better in the prone position than from a bench. For some reason, it seemed clunky on the bench. In the prone position it's pretty comfortable and easy to manipulate.
-I didn't use the cheek riser. I like my scopes low. That being said, the extra surface area made my cheekweld feel better.
-The cheek riser on the AR-10 model is modified to accommodate the longer charging handle. They do this by cutting down a standard cheek riser. This gave it a painfully sharp 90 angle, which I gave a radius with a jewelers file.