After a couple attempts to get a truly fine tip marker that stays sharp, writes smoothly and goes on without being transparent — this is the best I found. I've been using them for a couple weeks now. One problem: even though it comes with a magnet in the cap, instructions say to lay it flat (wait, what?) so I keep mine upside down on the fridge. This means I have to balance them against each other. If I don't keep them upside down, they don't write as well. Also, I think I ordered a set of 10, but it came with 16, two of each color. BONUS!