There isn't anything wrong with the quality of these pens, but the actual colors really surprised me.  All of the pens (with the exception of maybe 1 or 2) are very, very dark.  If that's what you're looking for, they're great.  But don't go by the barrel color, because they are not even close to the actual pens.  For example, the ones that look to be a peach color are actually orange, very, very orange.