I bought one of the HP22A black models a couple weeks ago. So far, I have put two 525 round Federal Bulk boxes through the gun. The only jam I had was when I let my thumbs drag on the slide while shooting the gun. If I keep my thumbs off the slide, the thing runs 100%. It is pretty accurate for a small gun.
I find the dis and re assembly to be no problem if I follow the directions. When putting it back together, I install the spring then lay an ink pen along the spring to keep it in position. Then pull the slide back, and flip the slide lock lever up. Pop in the barrel, then keep a bit of downward pressure on the barrel while easing the slide forward. I have many 22 pistols and revolvers. While the HP22A is not the highest of quality, I feel it is a good gun for the money.