Review on Niviy One Way Window Film Daytime Privacy Mirror Effect Reflective Window Tint For Home Self Adhesive UV Sun Blocking Heat Control Glass Door Films 23.6 X 118 Inches Silver by Rich Shankar

I've been in my home for 19 years now, and I've had numerous neighbors come and go now over the years. I'm not a big fan of extensive window "dressings", I don't particularly like curtains, and I don't like blinds or shades, and definitely don't like having to use combinations of any of them. That said, I use just enough on a window to provide privacy, but during the day I really like the natural sunlight to cascade into a room. So generally I open the curtains so the light can come in, and I can see out. Increasingly though, I've been looking to make my windows semi-private during the day, and this product has easily addressed that need.This is a fairly decent film. It comes rolled-up, and has a clear protective backing covering the surface that gets applied to the window surface. My only complaint is that this clear protective backing doesn't have measurement marks on it, so when you need to cut the film to a certain size, you'll need to draw a line across it. Other similar products I've used are marked with guidelines. It does take some effort to separate the clear backing from the film, but using the "two strips of tape" seemed to work best, but takes some trial and error.The application-side of the film seems to be a little bit tacky, but not sticky.Once the backing is removed, I liberally sprayed the application-side of the film with water containing just a bit of car-wash soap in it, and also sprayed the window and evenly distributed the water across the entire surface of the window. After lining up the film, I just used a large rubber squeegee to squeeze the water from top to bottom, side to side. I ended up with virtually no bubbles and the application looked great.I can also confirm that the film can be easily removed. Unfortunately, on my second application, a couple of my cat's hairs were caught onto the film. I removed the film and then removed the hairs, then re-sprayed the surfaces to reapply. Initially, it seemed like this caused a distortion in the film, almost producing a "cloudiness". I was concerned and disappointed at first, but because of the location of the window, I figured the appearance wasn't paramount. Surprisingly, though, over the course of two days, the cloudiness disappeared, and the film is once again clear. So I suspect having the sun's heat on the window caused the issue to clear up. If this happens, I wouldn't panic immediately.I am pleased to say the film does not fall off. It stays adhered to the window. The corners do not slowly work themselves loose, and overall it provides a clean and consistent appearance. I'm very pleased with how easily this installs and how well it adheres.It definitely provides privacy protection during the day. During the day it is next to impossible to see into the window. I've tested this with a person standing directly behind the window, and can't see the person at all. If you get right up to the window, and if there's enough light in the room, you can certain see inside, but at that point, it would be obvious that somebody is looking right through the window.This also significantly cuts the intensity of the sunlight coming through the window. I would say it's close to a 75% reduction. It provides a nice filter for the light, and also reduces the heat transferred into the home. I was able to confirm this at an second-floor bedroom window, at which I only installed the film on the lower part of the window. The early morning sunlight coming through the lower window and hitting the floor is significantly filtered, reduced in intensity, and reduced in warmth by the film, as compared the sunlight coming through the upper window pane.The biggest test for me, though, was whether my cat would approve of the filtered light. She doesn't seem to be bothered by it. She will still curl up into the sunlight even though it's filtered and the heat is not as intense.I approved of this so much that I ordered three additional rolls to apply to more windows. I think it's a great product that does exactly what it claims it should. I recommend it.