Last few days, I heard from my costumer saying that she bought this OPI strengthener and totally used it for like 2months, everyday. And now her nails are like super nice. She said she use to have weak nails. Nails will auto crack when it grow long. And this is what I have. And that's my saddest and worried problem! So I also bought myself one and try it. And we shall see! :) hope it really help! Please! :)