They look like prisma markers. I've never used them though- I've only used sharpies and La Plume markers made by marvy i think. they're for stamps but they're not too bad- at joann's or michael's craft stores
If they're like prismas then they should be good, I've used prismas before and when you get a fade it looks sick, just watch how much you put on cause they dry a little bit lighter as most due, but for prismas the suttle change takes a little longer than most markers
Great quality though, you can't go wrong with em
I mean I set of those and a set of Deco colors for outlining etc and your set!