Class product! Sure, you need a UV lamp, but for me the purchase price is totally worth it. The product is super easy to work with and keeps its promises! Two weeks holds determines the paint. Also use color by Bluesky, everything works great! One has to be careful that you do not paint over the edges, especially at the back of the cuticles, otherwise air and makes the paint very quickly going back and looks ugly. And do not forget at the end to remove the sticky layer! I just go with acetone-free nail polish once on each nail.