I have one for my Glock 22/35. I like it, except loading the magazine is a pain, and it only came with one 10-round. Advantage Arms had on their website that they have no plans for making a high-cap, which is a little disappointing to me.
As far as accuracy is concerned, I shoot it as well as the .40, but I practice at relatively short ranges (7-10 yards) and shoot for center of mass on a big target. Aguila 60 grain SSS cycles it fairly well. It is supposed to take only high-velocity ammo, and I only had feeding problems with some target ammo with the flat tips. To be honest, I haven't tried a bunch of different stuff, but the "Xpert" target ammo in the silver, red, and black box is the blunt-tipped stuff I'm talking about. CCI stingers, Thunderbolts (Green box), and the Winchester high-velocity ammo in the white boxes are pretty much what I stick to.
It is a solid little unit, except for the magazine. The magazine feed lips are plastic, and it feels a little flimsy when loading- flimsier than the plastic 10/22 mags. It does seem to work, though.
I've had it for a few years, but I really haven't used it that much. I guess I thought it was negative training because of the low recoil for followup shots.
Hope this helps.