Update January 2013: I was called by a Mumbi staff and he apologized that I was dissatisfied with the product. He offered free to send me a new set and to give the product another chance. Said and done were a few days later the new films in the mailbox. Well, I have to really first a defective product caught, because the new films work perfectly. Merely attaching's like getting fiddly. Without dust and bubbles It's probably not. But all films except those that applying moist. So now zufrienden.
