I tried cheap screen protectors and shattered about 1 per week. This one has lasted months with no marks. Finally has a tiny chip in the corner so have bought a replacement. Not a mark on my actual watch and there have been many times I thought I broke it, where the only mark was something transferred from what I banged into like paint from a wall. Yes I am very clumsy, but this protector has meant I can afford to keep wearing my watch.