I have it on my .308, I like it so far. I have had no issues with it. The mag release is intuitive and very easy to use. IMHO you cant go wrong with it. Also the ALPHA Industries 10rd Morta magazines work well with this system as well.
Here is a few pics:
have the surgeon as well-really like the mag release mechanism-very easy to do intuitively without looking and breaking cheekweld and the extended edges on the bottom metal make it easy to feed mags