I just sold my Sig Mosquito and three mags for a $100 loss because neither my wife or liked the gun. Great fit and feel in the hand with all the center fire controls, but a horrible trigger. Ours jammed like crazy until we had about 1,000 rounds of Mini-Mags down the pipe, then it settled down and would also run on CCI Blazer bulk. It didn't function well with any other brands of ammo.
If you want a fun .22 and don't like or already have a Ruger MK II or III buy a GSG 1911-22. Good trigger, decent accuracy and it will run on most any high velocity .22 ammo. The mags are pricey, however they are well built and the easiest .22 mags to load I've ever seen. Another plus-the sights are set in Novak dovetails, so replacements are easy to find if you so desire.