This film is to praise, there is a good description and you still receive a QR code to a video tutorial to. In addition, the film of 2 pages is protected.
The mounting of the 2-step technique succeeds very well and also the bubbles that übrigbliegen, Liesen removed completely.
Conclusion: For the money, there is nothing to complain about from my side, especially as indeed also has 4 attempts ;-)