I just started using this stuff, and I already notice a big difference! I've never been able to grow my nails very long without them splitting or peeling. I bought this and the Sally Hansen MegaShine top coat, and let me tell you, my nails look awesome! They're long, strong, and shiny! What more could you ask for? I even get to save money by buying the cheap nail polish colors that come in the fun colors and still get a great manicure. Try this stuff out, you won't regret it! Would highly recommend for people with brittle/problem nails. It's not a miricle cure of course, but the best by far. Great price! However the claims for this product are totally unfounded. This product did not protect my nails in the least. A simple bump results in splts and breaks even when my nails are down to the nubs, as they are now. I have always had great nails- my one vainty. I used to depend on S.H products to keep them that way. Not this one, and as a former user I am no longer going to spend money if the products don't keep their promises.