I work mostly in pen, colored pencil, and watercolor or acrylic paints - I've never actually worked with art markers before, but I trust Prismacolor and I thought it'd be worth a try!  The large angled tip is very large indeed, and the small round tip is just about right for smaller writing.  I would have liked a medium or small angled tip.  They have a nice steady flow of pigment, and a good spectrum of color.  On a smooth surface, the pigment bled fairly easily.  I'll be experimenting with a number of paper types to find the best match.