Great product worth the price [SEP] Nail polish last for 2 weeks!!! But I also use chima glaze strong adhesion base coat to help nail polish adhere. After a week or every 3 days apply another top coat the keep the polish from chipping and scratches. When I use red colors it does not stain my nails. I do not like the chima glaze top dry (nail dryer) coat. To dry (fast nail dryer) my nails I use Seche Vite . It dries quicker and harder; no lines or sheet marks. Both nail dryers have a tiny bit of shrinkage, Seche Vite has less.