I bought this product in 2020 and it remained in place and fully functional for 3 years and going in the Austin TX area. My garage door would get full blasts of sun during the day and cold during the short winter. It would insulate by about 10 degrees.I see complaints that the adhesive doesn't work. It is very very very important to thoroughly clean all surfaces. First, I use simple green to get most of the layers of dirt and grime off. And the I followed that with wiping all the edges with alcohol.When installing,you need to keep the tape as clean as possible. I would install one side to the garage and then wait until I needed it to remove the backing to the other. It was annoying but so well worth it!I did a lot of research before picking. I chose for the R rating and that it is lightweight and should have minimal impact on the door's operation. Their advertised temperature difference is about 10*.Our laundry is in the garage and we just melt.I can't get my photos to load. My temp gauge on a 70* day while installing showed the indoor door temp without insulation at 106* and with insulation 76.6*I have another photo after installation who has the exterior door temp at 121* and the interior insulated doorat 83*.I just moved into a new house and I'm planning on adding them here, too.If I can get passed the permissions issue I'll update with pics.