Tips for mounting: Before the display meticulously säuber (Screen Cleaner and fusselfreis cloth). The size of the display, it is impossible nahezug that no dust under the film creeping during application again (solely from the air). Stopping air would actually announced, but has not geklaüüt with me because of the duration of applying ;-) Therefore here often called tip with the scotch tape is worth gold: A strip of adhesive tape on the lifted edge of the film glue (never under the film hold, otherwise this equal in the trash) and with the sticking side facing outwards (so that lint is collected) wrap around a finger.
Why did I still again decided after three unsuccessful attempts for the film was the SP's Holder. This has taken the rubber top of the standard Spens a non-replaceable tip made of hard plastic. This can be convenient but write clearly a long time. Out of concern for my screen so had to go back a film on it and lo and behold: Now may be the Holder write much better (also and especially because of the hard plastic tip) than the normal SPpen.
Conclusion: Good protector in proven quality. Attachment requires time, patience and possibly Fehlversuce. When used with SP's Holder Kit highly recommended. Otherwise, perhaps enough also a case with lid.