These sunscreens work quite well. We remove them regularly ...
347470
These sunscreens work quite well. We remove them regularly and have a handy spot for them in the pocket on the back side of the front seats. They have held their "stick" very well. The only issue we've had is that if left on for a while, they leave a bit of a haze on the window. This comes up, but it takes some elbow grease to get it up. Nothing major, but just something to know.
239260
these work pretty well.  they stay on well and protect the cushions without looking like an old lady's house.
2952675
This is my second set of these. They stick nicely to my side windows in my Lincoln MKX and my Nissan Pickup.  Any sun blocking I can get I want.
I will give the extra 2 to my sister. I haven't driven with them in the windows but while parked they enhance the sun protection that I get from the windshield sun blocker that I use.
956001
They work very well.
Unlike the re-adjustable options, these are permanent. The process takes a bit longer but the finished project is much better re-adjustable options. They eventually show bubbles which doesn't look professional.
1242986
We find these to work better than other products.
4959976
This is an awesome sunscreen. I've been using this sunscreen for almost 2 years on a daily basis. Good protection and works as a primer/light coverage. I use bare minerals on top of it and coverage is flawless and looks very natural.
101081
This works very well in removing your old tan to make your skin ready to use sunless tanning again.
1835937
They are a good fit and reduce glare significantly. All in all, a pretty good product at a bargain price.
2550907
The sunscreen worked well but has many ingredients that are dangerous to coral reefs. I will use this when I am outside but not in the water
1299758
Fantastic product. It reduced the heat from the summer sun beating in our windows. After such great results we went back and bought more.
950452
Great sunscreen with high SPF.  Very creamy and good coverage!
3872851
It has worked well for me, just be careful of using it in really sunny areas as the plastic will weaken over time due to heat.
2267661
Pros: These work VERY WELL!  They attract and kill the pesky buggers very well! Used them for several years with great success. Reusable.

Cons:  Emptying them is an unpleasant task if you plan to re-use them

Advice: Do not place too close to where you spend a lot of time.

Other:  They work well for taking away your appetite if you need that done....
2515790
They seem  to  be  well made and they do help  to reduce  the  glare of the afternoon  sun.
376111
These work fairly well but require frequent reapplication in order to keep the glass clear. I am using both in a pool with a mask and on a mirror in the shower.
726584
These are very good covers. We have a lot of sun and they are holding up very well. Also they fit well!
3861527
Because I have Lupus, my skin is very sensitive to the sun.  I am always looking for good "sun protection" products.  I like these a lot.  They are a nice, stretchy material, are comfortable to wear, protect my hands nicely, and dry quickly when they get wet.  The off-white ones I bought are an unfortunate color, as they always look dirty.  I would suggest another color ... ANY other color, but would buy them again