Glide, no impact on the effectiveness of taclie, somewhat deterioration of brightness but so little ... And especially so robust that one wonders why there are 3 in the blister ... Given the rapid obsolescence of smartphones (the N8 is super strong but unfortunately, since Nokia has abandoned Symbian, resources become scarce and N8 becomes less smart, too bad, I liked him, sniff) this film that stands on my phone for 3 years will definitely still on leave when my N8 recycling. So why put 3?