The window allows to monitor effectively the touch screen of the iPhone. But the negatives are: - Unable to use with the home button cache: When screwed back shell, the pressure it exerts on the phone holds down the button and Siri brings back all the time. Furthermore, as it is pressed continuously, the iphone is unusable. If the solution is to let loose screws, it is unacceptable. - I have a Bolse USB charge cord. The shell does not connect to the iPhone - The rubber between the two hulls is too soft and completely distorts when closing the shell.