Mine was made by Pietta. It was another "Pig in a Poke" purchase that turned out great for me. The owner said it was trashed, including the barrel, which he said did not fit the frame properly. A previous owner had antiqued the finish, then dry fired it until the nipples were completely ruined.
I got it very cheap, yet it turned out to be like new inside! The SN on the barrel matched the frame, so I don't know why the guy thought it was a mis-match. The gun had probably never been actually fired, and the inside of the barrel and cylinders were like new, once I got the dirt and dried oil out of there. A new set of nipples and it was ready to fire.
Mine is as accurate as the shooter. It shoots about 8" high at 25 yards. It is a little strange to operate and shoot, as with no trigger guard it is nearly impossible to cock one-handed. Once it is cocked, it is mostly like shooting any other gun.
Loading it is very slow, as you must remove the barrel and the cylinder. A loading stand is essential, in my experience. I found mine on the internet for $35 IIRC. The caps must be installed before re-assembly, which is clearly dangerous if you are the kind of guy that can't focus on the task at hand. I always load all 5 chambers, and always use caution when loading and handling it, as should be the case with any firearm anyway.
This is the only BP gun I have that I do not completely disassemble to clean. I take off the grips, remove the main spring, the hammer and hand, and the mechanism that goes behind the cylinder (I can't remember the name) to rotate it. Then I put what's left in warm soapy water and scrub whatever I can and rinse it off well. Repeat once or twice more. After that I blow it dry with compressed air, squirt it down with Ballistol, blow it off again with compressed air, and reassemble. I never have had a hint of corrosion using this method.
Those are the main points to consider that I can think of at the moment.
Here are a few more pictures...
Here is a reproduction of the original 5-at-once powder dispenser;
Loaded and capped, and ready to fire;