I've been using them for almost a year now, and I like the feel of them. They take a bit of getting used to, as they have plastic tips -a bit more squirrely than the nice "grip" you get from felt. Also, BECAUSE they're plastic, you might consider what you're using them on: I wanted to use them on canvas pretty heavily, but there's not enough....forgiveness on canvas. Because there's no "give" like felt tips (or like you know, soft tips, whatever), that means you really feels stippled "skipping" of drawing a line on canvas with these. On flat paper / surfaces, they're PRETTY CLEAN, once you get the feel of the control. In fact, ngl, about half the time, I use them to ink down letters in my scientific journal . The paint is paint, it's prone to smudging before it's dry, and even some danger of smudging if it dries but gets wet, so that's a consideration. All in all though, I REALLY LIKE them, and I'll get more when I'm out. But I also need soft tips, so I'm still hunting through reviews on those....