Installation is an extremely tedious and complicated process, even for a competent DIYer. Video makes it look easy, but there are SO MANY things that can go wrong that it does not address. Patience, good eyesight and a VERY steady hand are a must. While liberal use of the application solution definitely facilitates the job, it in no way makes it "easy." Film likes to dimple and crease during measurement and cutting, trimming the film is like performing neuro- surgery, especially in the corners. Heaven help you if you have a pet in the house, or any dust floating around whatsoever! Even after a thorough cleaning of the window, tiny particles get trapped between the film and pane creating unsightly dimples. The cutting tool in the installation kit dulls after 10 linear feet of cuts requiring you to purchase an entire new kit for $10 just to get another cutting tool, which is not sold separately. The film roll I bought for $28 had enough film for 3 windows, however with do-overs, I was only able to complete one. -Plan on spending extra for material due to "do-overs"
User's recommendation: -Plan on spending extra to buy multiple installation kits just for the knife -Cutting tool (1/16" offset) slices the tiny gasket around the window. -Plan on second guessing your DIY ability after completing the job.