PROS: Inexpensive, dependable, and accurate. I shot 50 rounds through each of 3 handguns today at 30-35 feet to qualify for my concealed carry permit and the HP22a produced the tightest group. Could be because the others were a 2" 38 special and the other a Kahr cw9 (9mm). But I was really pleased with that and this is the cheapest of the three. It's easy to shoot, being a 22.
CONS: 1.Redundant safeties which prevent the rack from being pulled fully back unless the magazine isIN the gun, which makes it different from the typical semi-auto gun, and compromises safety, IMO. YouTube has a couple fixes for that which a lot of people follow.
The gun is not easy to disassemble for cleaning of the slide barrel pin. The recoil spring pops out and flies out of site easily. (I never found my first one and had to order extras). However watching some YouTube videos and taking notes made it easier when I went to replace the spring). However, you don't need to disassemble all that often if you clean the barrel and chamber area regularly.
All in all, it's about my favorite gun (after the safety modifications) and I'll probably buy another one in time.