This `book` was translated from some other language into English and is a complete disaster. Almost impossible to read as most of it makes no sense to a native English speaker. Do NOT waste your money.
I've used screen protectors on every electronics device I've ever had and these are the worst I've ever encountered. None of them are really 'easy' to apply but these are particularly difficult and I never did get one on correctly. I will admit it may have just been me but I sorta doubt it since I've done it so many time before. I won't use this brand again.