I bought one several months ago. A few points come to mind:
1. No half-cock notch in the hammer and no way to add one. Bad from a safety standpoint.
2. The hammer does not hit the nipple squarely - needed work on hammer face. Hammer can't readily be heated and bent.
3. Nipple was oversize for a # 11 cap (not uncommon and an easy fix).
4. Pistol's grips were rough-sawn and stained orange. Really ugly. Changed that quick fast and right away.
5. The mainspring is not strong enough to reliably fire a cap, even after the hammer and nipple issues were addressed. Because it's a coil spring that compresses completely when cocked, there is no way to even add a spacer to increase spring tension. I tried stretching the spring - temporary fix at best.
6. The flash hole is very long - had to bore it out slightly to insure ignition when the cap does fire.
7. On the positive side - they are well finished (except for the grips, that is) and are very inexpensive.
Maybe other folks have had a more positive experience; at least I hope so. That "inexpensive" feature is appropriate. I have one but would not buy it again if it was possible for a "do-over".
One guy's opinion and I realize that it's just an opinion. But it's mine.
sneezy