Got these markers as a gift for my wife, who's a semi-professional artist. I personally don't know too much about art tools, but a quick google search for "artist grade markers" often gives you either Copic or Ohuhu. My wife is a thrifty woman and would be angry if I were to overspend. Ohuhu were best value for money and came in more color options, which I thought she'd like. Turns out, I was right. She loved them and I earned a lot of brownie points in her eyes. I actually have no idea how they draw or anything about how long they last, and can't speak to the quality of their performance. But I can tell you that her eyes lit up when she opened them.