These magnetic shades do just what I wanted. They don't fit the window 100% (I have an suv), but it's one size and has good coverage. The magnets do slide around, but you can adjust them and sew them in place. Keeps the seats from burning your skin!

If you live in a place where it gets to 100f this is for you. It noticeably keeps the temperature low inside the car if you leave it parked or you have to wait for a long time in the sun with the AC on. Only drawback is I wish there was more magnets so we could make it fit better.

It works well for me. It is like the sun shader that the sienna van comes with (roll up tab) in the back seat. Except this one is magnetic (and needs two hands to put up). Is lightweight. Easy to attach and remove. In the beginning, it was hard getting used to seeing through it, but now, it's easier and I appreciate the shade. My passengers aren't used to it, so they don't like it. Good purchase for me.
Update: It's been helpful this summer. I got used to having one on each front side window. But then it got sucked out by accident even with an inch open window. I was at a red light and started to accelerate. So I am going to order another one. It keeps my front car less sunny.

The other day I was thinking, "I've got to review these sun shades, these are great!". Took me a little while to get around to it and I guess that was a good thing because now I'm returning them. They were awesome and exactly what I wanted. It's not easy to find ones that block the sun as opposed to filtering it. And the universal fit actually fit pretty darn good on two very different vehicles. A '07 Camry and '13 Ford Edge SUV. Not perfect, but darn good coverage for a universaly sized shade. The magnets worked great, install was quick and easy to put on and shift around until I could get the best coverage.

But it was the magnets that ultimately failed. They started shifting around in the seem. That meant some spots were secured extra well and other spots were not secure at all and it would sag. I'm not sure if they were meant to be loose in the seem or if they were glued in place and the heat of the sun caused the glue to fail? At least I can return 'em. The search continues for something similar that might hold up better...

UPDATE: As usual, Amazon's return process has become quick and simple, but I ultimately chose to keep the sun shades. I had ordered a competitor's set and found the quality in the seems to be much worse than this brand. I also learned from further shopping that the magnets are designed to be moved around through the seem to get a better fit for each application. I'll up it to 4 stars because even though it's a good idea, once the magnets are positioned, the item offers no way to keep 'em where you want 'em. My wife suggested a safety pin, I may put a stich in the seem on either side of the magnets once positioned. I think it will be worth it because these definitely are higher quality than the competitor's I just bought.

A word to those who are complaining they don't fit their car / SUV perfectly. These are a UNIVERSAL fit. The odds of a PERFECT seal is a million to one. To be a Universal fit, they can only cover MOST of the window. If you're looking for a perfect fit, I believe I've seen similar sun shade designed for SPECIFIC vehicles, but odds are you pay a lot more for that. I prefer the 90% coverage of the Universal fit, not just for the cost savings, but the ability to move 'em from my car to my wife's when needed.

It really make a huge difference inside of the car. and helps me to protect my face from the sun damage when driving.