I like these pens. They work well, flow good when writing with them. But I'm not totally sold on the sizes. The 010 size is good, I think I'll use that one the most. But I can't really tell any difference between the 010 and the 030 sizes. Seem pretty identical to me. And I almost want the 050 to be larger, more marker-like. But that's just personal preference. They're good pens-no issues thus far. Wish you could buy them individually so you could just pick which size(s) you want. They should come in white too. Can't believe Becky missed that!