Wanders film

Bi the price you can not complain to attach the film requires a bit of patience you. Bubbles free works well so far, just "wandering" the film every day a 1 mm to the right or left. This is commonly observed in the hole recesses for the FaceTime camera or the Home button. Times the film is closer to the right hole, time left ... What is the reason I do not know (possibly due to expansion Temeraturunterschiede?). I keep you, as it has not adversely affected the functions or the camera. But again do not buy more.