i JUST got my iqase side and swift both with a package of the clear crystal film, let me tell you it does NOT affect the functionality of the touchscreen, it feels a TINY smidge "tackier" but i have found it cuts down on the smudges quite a bit as well, so all in all I am VERY happy with my purchase of these cases and film. By the way im using the Siwft model and my girlfriend is using the Side, both with film.