Found one "used" on Tuesday while I was out and about just browsing. Looked pretty new and so did the magazines. Felt good with nice balance. Love the plain black rear sight. Trigger feels a little better then my stock FS M&P, which has proven ULTRA reliable and accurate enough for an out of the box striker pistol. Wife and I put 150 rds into it yesterday. For me it shot POA/POI, for her it was about 1.5" low at 10 yards. That said her "younger eyes" put 3 out of 5 rds though the same hole pretty consistently. For me consistent 10 shot groups of 1.5", which is just a hair bigger then with my two target pistols. (My eyes are old, and I'm happy to maintain inch and a quarter groups. Sometimes I get lucky and get a few under an inch.)
I like the gun. I like and trust my FS M&P which has become my nightstand pistol. I really can't see keeping both, but I'm not in a hurry to dump either one. If the Pro proves as reliable over the next 1000 rds then it will probably be the keeper. Not sure if the pro line takes standard night sights, which I like on my night stand pieces, or at least a tritium front.
My only real gripe, and not sure if this particular pistol is the only one that does this: the texture on the interchangeable straps is different, and I do like the way it feels. But these all seem to have a little "wiggle" when installed, where as my standard FS does not.