I have a M2, left hand model. Out of the box the "comfort tech" hurt using only target loads. I hate to think what my shoulder would fee like after a half box of magnums! I put a mercury reducer from Brownells' on it, it helps. I also took off the original pad and placed a slip on "HI VIZ" pad, that brought the recoil down to a manageable level. I still don't know if this is the one to take on a "hot barrell" dove shoot of 800-1000 rounds per day, only time will tell.
Mechanically it is a great gun; recoil wise, it still has a real problem. I think it would benefit Benelli to do a little more field testing of their new products under true hot barrell conditions, and put a little less money in their propaganda.