This is a good product, an amazing product, but you have to know what you are doing. I bought it at a beauty supply near my house. Pros, if you know what you're doing this is amazing and the results are going to be perfect; Cons, if you don't know what you are doing! Then that is a problem, because it will then damage you real nails and get then really sensitive and very close to the skin! Girls be aware and be careful using this product, it will hurt you a lot! I didn't know what I was doing or how to do it and I suffered my mistake LOL😂😩 Hope this Help!