I've shot mine a ton. I've shot it next to other 22lr pistols and found that it jams on the same ammo that the other jam on (which makes me blame the bullet, not the weapon and in fact those shooting with me changed ammo). During my sessions I've gone through well over 500 rounds and only had one jam when firing someone else's supply.
The only comment I have is that everyone who fired it had the safety on the first time they fired and thought it failed to cycle or fire so they threw away a good bullet. lol The other thing is the spring etc. I'll venture that many who didn't understand metal thought they broke their gun taking it apart and kinking the spring when in reality it'll just straighten up after awhile.
Honestly, that was it! I could group well at some good distance at the indoor range and it seemed that everyone who grabbed it could do the same if they had any experience.
I purchased this for my wife to learn how to shoot and I have zero regrets. She has learned how to shoot, clean it, you name it all from this little compact and it's made her want bigger and has already considered a 9mm.