I read all the reviews before buying it but in the end, I am very satisfied. For positioning, it is necessary to help the notches provided for the "pregnant" and the front camera at the top of the device. Regarding bubbles, yes it y 'but it is the fault of all the protective films. The slightest dust and it bubble. Regarding the scratches left by the card, it's not a problem since the film is placed between two filter that removes protections once glued (one on the side which comes against the screen then it removes a When stuck).