Hi There Deacon
Well . . . they are a little (lot) on the rough side. When new, quite stiff. Not particularly "pretty." I guess the best description I can give is "Functional." I also think the JW 2000 is a tad light in weight so "Cowboy" level loading is a good idea.
Currently, the "budget" priced Hammer Doubles are in very short supply. New not at all unless "New Old Stock." The only choice if you don't want to drop a Grand on a new quality gun is to go "Pre-Owned."
There are NO parts available for the JW2000. Therefore I can't recommend having at it's innards with sharp tools. About the most I would consider is to do a little polish of the chambers. DO NOT mess with the springs. Messing with the springs is a "one way" trip.
Normally, when one considers the JW2000, and asks, BEFORE purchase, I would say "Don't" but then again from a mechanical and appearance standpoint I'm a Double Gun Snob. It should be quite functional if not quite "pretty."
Stay Safe Out There