I've been mostly happy with my Kimber .22 caliber top, although out of the box, it wouldn't work reliably with standard velocity ammunition. I had my gunsmith make up a second, slightly lighter main spring, and it now works just fine. I'd hoped it would turn out to be a match pistol; unfortunately, it's just too light, and the trigger that's okay for a .45 A.C.P. is too heavy for a .22 long rifle.
Several of my fellow bullseye shooters use the Marvel top. One top's extractor chewed a hole in the barrel. Marvel replaced it, and the top seems to work fine.
Another fellow had a woefully unreliable, inaccurate Marvel top. He sent it back, and it was replaced with one that seems to work much better.
I forgot to include the picture. Can I add it with an edit? Can't I?
The pistol currently sports a Docter red dot sight, but I don't have a photograph of it. The dot is twice as bright as any other I've ever seen.