I'm not perfectly satisfied with this because I managed to f*** up Thor's fabulous hair once again, mostly because I rushed it and did it in less than 3 hours, and I guess, I will do another Thor piece sometime in near future, but for now this is it.
I think, Trust tablets (the same like Wacom, I assume) are compatible with most of the OS (all the Windows and Mac for sure), you can use the tablet for drawing in every drawing/painting software you've got. How exactly does it work? Well, you "draw" with a special pen on your tablet and all the lines and coloring appear on your monitor (except for the expensive Wacom tablets that have a screen of their own). I really don't know what else to add. The technique does not differ much from traditional art, it's just your hands don't get dirty.