To begin, I bought this shower door based on good reviews and the overall looks. it is a nice shower door. The instructions are a joke,  Seriously, is this company not able to hire a person who speaks English?  The part about what length to cut the top rail is like reading about a train crash in a language of which you are familiar with a few words.   "If the installed rail is longer than the front door width, according to the right to measure the front door installation distance, marked "W" according to: rail length minus the front door measurement width, 25mm, cutting length "L".  What?

Luckily, they provide an even more confusing example, from which you can extrapolate that you need to cut the top rail 1" short of the shower opening....Other than that, it's a nice shower door.