I'm having a lot of fun using these pens to sign my quilts now. I like that there are many colors to choose from, my only regret is that there isn't a color I can use on darker fabrics like black and navy. Too bad there isn't a silver or gold pen like this. All of the pens work great except the black (for whatever reason), I have to trace over the black multiple times before it stands out nicely. I think it's just a manufacturing thing.