The guys who did my CPL class used the Mosquito for their rental guns. Based on how they functioned for the 30+ folks who shot 30 rounds through the five of them, I would not want one for myself. This was outside in early October in west Michigan, about 40 degrees outside. Not exactly cold enough to make the guns malf. Still I saw several FTE, double feeds and misfeeds. They don't like to run dirty. They are very picky on ammo (pretty much limited to CCI mini mags). Their accuracy was okay, and they would make a good trainer if you bad a service caliber Sig. But for a range plinker, not for me.
I'm probably going to pick up a Smith & Wesson 22a. I like them about as equally as I like the Buckmark and Ruger MK series.