I bought these pens because I recently got some space stationery and it had black paper. I was going to buy milkypop pens because I remember them from back in the day and I'd always liked them, but I didn't realize how expensive they were! When amazon suggested these to me for 2/3 the price, I figured I may as well give them a shot. After all, I'm familiar with ohuhu because of their alcohol markers being a nice dupe for copics. I'm happy to say they did not disappoint. Not only do they write smoothly with really nice color, they're nice and opaque on my black paper, they dry quickly, and they include metallic silver and gold as well! I couldn't be happier with them.