I run one with a few other little mods that Zed (Rich) on the AA owners sent me to test, been running it for over a year now. yes it takes some recoil out, & I think it has a faster lock time.
You do have to play a little with hammer spring tension & firing pot length, but we are talking a mm in or out.
I had another machined & did write down how much weight was removed somewhere, it was quite a bit. The spare I have a was going into someones rifle but they sold up before it got fitted.
I fill to 170 on my bottle, which seems to be 150 on the gauge & easily do a 40 shot course & plink before & after. I can see the pellet travel to the target as well sometimes, even on 9.5 mag.
In life you should not persue goals that are easily achieved, develop an instinct for what can be only just achieved through your greatest efforts.