this review title is: worst product i ve ever tried and the content is: i was really excited about this product but if zero was an option i d give it the pens are black with no way to tell the color inside it takes a long time for the color to come up if its not the one you want you have to do it again with another pen comes out with all kinds of lumps does not dry properly with the uv led light total waste terrible product.there are other information for this review, one is this reviewer did purchase it and the other is 0 people think this review is helpful.