I was a bit skeptical as they seemed too thin for my rear window. However, they were exactly the same size/fit as the old ones. I was so tired of getting hit by windows in the back of my head so I took a deep breath and installed them. SUPER easy, fast and I LOVE it, when I press the open button on my rear window I hear a slight pop and it pops open like it should! Not too fast, not too slow, just perfect. It goes up with no problems. However, I have to admit that the first 5 times I used the rear window after I put it in, it took me superhuman strength to close it. After that, however, it is easier to close it. They're still tight, but it doesn't take much force to close them. Be sure to step away from the window! This is not about safety for anyone! LOL (that's good) My rear window now stays up until I roll it down. LOVE IT!