Although the film for the front is also not perfect, but it holds at least reasonable. Also concerning bubbles I had no problems here. Unfortunately, this film is just as prone to fingerprints as the display itself, so that the iPhone quickly "greasy" look. But the image quality is unlike many a matt foil TOP.
However, the films for the back are a disaster. Since she minimal survive at the edges, the problem arises that if you put the unit on a bed (cloth) and moves, stuck the edges of the sheets in it and dissolve the films thus.
Already after a few minutes, the top sheet had come loose and a few hours later and the bottom. Only the great in the middle is still there, even if the edges were often hooked and lint have formed underneath.
All in all a very clear NO to buy recommendation. Since there are better.
UPDATE:
After a replacement, I correct my judgment somewhat. There are still better, but it is definitely satisfactory. Making a purchase I do not like recommend directly, but I would not advise even entirely. If you do not want to have the best, but is satisfied with "OK", then you can probably still strike here.