and it breaks down as
Walther P11, 1
S&W 22A, 1
Sig Mosquito, 1.5(Would be 2,except Conant sort of damns his with faint praise)
Beretta Neo, 1
Various model Ruger, 7
The big gripe with the Rugers is takedown/reassembly, otherwise their owners generally love them. Decent price, solidly made and accurate. Which has been my experience.
Of all these, I've fired the Ruger MkII and 22/45(early version), Mosquito and Neo. The Mosquito I wrote about friend's problems with here; it was fairly accurate, and comfortable in the hand, but I've heard of too many problems to be comfortable recommending them(side note: Tam says she believes it's made by Umarex for Sig; doesn't Umarex also make the Colt .22 version AR15? And doesn't it have a bunch of problems too?).
The Neo looks halfway like a ray gun, and the one I fired was both reliable and accurate; the guy at the range who let me fire it loved it and had two: his and the new one he was sighting in for his wife.
On the Walther I've read of a bunch of problems with slides cracking; anybody know more? (I think I read somewhere that Umarex makes the slides; if I'm remembering right, damn) The other side is, a lot of people have them and love them.
So that's what came in, make of it what you will. Ruger has their problems, but they do make some good .22 pistols.
Know what I'd like? Someone to start making the High Standard Sport King again; that's a fine-shooting thing, and solid as a rock.