The cintiq has one flaw that I can think of, and it's that do to the distance between the actual monitor and the drawing surface, your line will always be a little off. It's something that an artist can get used to, though.
Of course, then there are the people at my school that think they're artists because they use the school's cintiq to trace instead of learning how to draw.
Anyway, enough on tablets. You have a great website, clean and simple. I didn't realize you did the TRO art for those 'Mechs. If I may give a word of advice on your site, though, I'd suggest increasing the contrast a little to make it easier to read.