Have previously installed 3M and llumar to my 2nd storey rooms few years ago. Decided to give Pacco/ZonLing a shot for their premium range of solar films for my living and study room. Installed the x70 & z40. Really value-for-money compared to alternative brands. You can literally feel the whole area is cooler and strong direct sun rays adequately blocked off without compromising too much on brightness. Installation was efficiently done. Highly recommended. Thks Chris for your patient demo of the films too!