Try it now already the 6.Mal. But, I can not even begin to get it to last at least 2 weeks. After 6 to 7 days, the first nails solve or break away piece by piece. Especially the right hand, it is the most stressed. Once hit somewhere against the nails shatter like glass. Remover I have not even touched yet, because everything falls off by itself. And in 20 min I'm also not done, if I have to do both hands. Since I am right-handed I need for the right hand a little longer.