Very easy to install, but I suggest cutting to size rather than a bit oversized then using a cutter to trim off the excess. The film has little square/grids making it easy to cut a straight line. Very good for daytime privacy without the lights on but not so sure when the lights are on especially for bathroom windows. Don't bother with paying extra for express delivery. I paid for guaranteed delivery within 1-2 days, but did not get it until 4 business days later.