The sets seem to vary in their effectiveness, I’ve tried 2 sets that worked pretty well and a further 3 sets that have been useless and one set had to come off after 1 day because they were peeling so badly. I applied all of them in the same way and the most recent failed set even used all the additional sassy saints materials (buffer nail push back etc), so it’s really disappointing. I had one set last 2 weeks and even a pottery making class and various gym sessions and was amazed, but it seems to have been a complete fluke because the other sets just do not stay in the same way at all.