Dale I'd guess maybe about the same. If you paint as little as me, or aren't producing too many baits for other guys you should be fine. They also have the refills and those last a while. Just make sure you put the caps back on tight! I've only ran out if blue, and my green is getting low. I've been using then for some time now.
Also, I use the comic on flies and streamers simply because there is no clean up and it lasts on the fly. On lures I'm still getting around the whole paint coming off part but that's just a kink in my epoxy I use. Once I find a good one I'm sure it will work just fine. I feel it has just about the same limitations of an airbrush, but you can not mix colors unless you spray on. It's a pretty cool system though.