Wayne - I don't have one, but I looked at the manual for one. They mention many times that you can't spray anything with a flashpoint below 70F. I think that would rule out lacquers, alchohol based dyes and shellac. I suppose there is the possibility of the thing exploding or turning into a flame thrower with volatile stuff.
I also don't see any option needle sets / nozzles to optimize use with different materials. It really seems designed for contractor type applications for the DIYer.
I know you really want to hear from someone who actually has tried one, but I just wanted to offer the above in case you are thiniking about trying one if you don't get any responses from experienced users.
Ed