As Grobmotoriker I had after reading the negative reviews, of course, concerns about whether I'll get along with the slides. In fact, it worked only with the third film, and does not sit entirely free of bubbles. Especially around the speaker is formed small vesicles. The reason is, I think that the film is one hundred percent fit and no leeway. So it is perfect for little fingers skill and a steady hand. That I do not have that, is not the fault of the film. Since me exclusively do not interfere with (very, very small) air pockets at the Ränden not covered two practice sheets at the price the weight and the film it really sits well, I'm going to buy these films again if I need new. I can probably give five stars, right?
My films were actually a little lint handkerchief in to clean the display. Very useful are also the advice in the review of Sash from 1 July 2011 ("Perfect fit with a few tricks (Instructions") as well as a video on the manufacturer website.