I have a 22/45 and it's a lot of fun, accurate, easy to shoot, etc. Great deal. I like Sigs in general but I hear lots of bad things about the Mosquito. If the Walther 22 didn't have such awkward controls (IMO) I would have considered that. That's too bad about the Mosquito. Oh well, can't say I feel too bad about crossing a gun with such a dumb name off my list. I actually had heard a lot of bad stuff about the P22 not long after its release; I wonder if they've resolved their issues (a lot of jamming, IIRC). My buddy has declared me a sissy for looking at .22s. Meh. I just want something that I can learn on, shoot a lot for cheap, and develop good habits with.