didn't stick to the rear window. I cleaned it ...
595355
didn't stick to the rear window.  I cleaned it, washed it, and still nothing.  I tried with 2 different wide lens.
1516191
It was smaller than expected and didn't want to stick right i cleaned the window and all had trouble sticking
1266740
It sticks at first, but then after opening and closing several times, it won't stick to the glass anymore.  I've cleaned it several times.  It sticks great to my countertop, but not to the car window.  Not sure.....
4169531
Worked perfect for an old sticker on my back window. It came right off.
1372126
Don't have backseat windows so i attempted to use the velcro, however the velcro did not stick at all to the inside of my car. Even after cleaning the spot for the velcro to stick. Can't use.
1570444
Editing to increase my rating. At first, this would not stick at all. However, after cleaning both the suction cups and the windshield with a white vinegar solution, I was able to get a firm grip.
845834
Sadly, after about six months it doesn't stick to the window anymore. I've been using window film for years and this is the first product that has failed.
4110323
It didn't stick to anywhere in my car, garbage
1703286
double side tape did not stick even after prepping the mirror with alchohol.  pealed it off and re-taped, then held.  middle of cover not matched to mirror housing, had to double thickness tape to stick it.
4186351
I took the adhesive off to stick it to my car yet it appeared someone forgot to put the adhesive on...It was not sticky what so ever.
3720012
I did clean my emblem off the best I could. I own a 96 and it did not stick the best. I know if it was warmer out it would have stuck better. I am too much of a perfectionist and just went with painting it black.
4155338
Although I was under the impression this would be ok for a rear window I'm still very happy with my purchase! Great product and better than any others I have purchased.
3557867
Fell off the window many times. The left latch was stuck and didn't open when I pushed the button to release. I ended up throwing it away :(
412767
well it did not stick to my dash board for a long time but it might be my fault the one before this that came with the home kit worked for one year until I wanted to move it.  So either I didn't clean the area good enough or the wire was was pushing up on it so it wouldn't stick good enough
4848102
Purchased these to remove the back glass door of my note 5, however it didn't stick. It does however sick it unbroken smooth glass and to the body of my suv. Would have gotten 5 stars if it actually worked for the purpose i bought it for.
4421577
didn't stick well to my window in my truck... used clear gorilla glue to hold it, and it works well.
4586475
They don't stick to the windows. Grrrrr. We used to have something similar to this years ago, and they were great. These are too large and don't stay on the windows. Don't bother.