Most of the reviews for this product are from customers who purchased to reduce the temperature in their garages. It's January in North Carolina, my garage is about 50 degrees, and the master bathroom above it is about 61 degrees, so my goal is to keep some of the cold air out of the garage that's attracted by a giant metal door, and in turn, keep my bathroom temperature a bit warmer. The box arrived quickly, with the tape squares, but no instructions (although the process is pretty self-explanatory, and the reviews here gave me some installation tips). I vacuumed the inside of my door, followed by a wipe down of denatured alcohol (others used a mixture of Dawn and water, but I didn't want to chance that freezing). I then applied the tape squares. For each panel, I used 5 squares...one in each corner and one in the middle. I let the tape "cure" while I cut my panels to the correct lengths. Don't assume that your panels are all the same size, because they're probably not! After I cut the panels, I checked the fit on the door before removing the top liner. Installation was very easy and you can move the panel if you do it quickly before the tape sets to it. The top "row" of my door has windows, so I cut the panels to fit around the windows. Others have suggested getting pieces of black felt to cover the windows for additional insulation, but I'll wait and see how this kit performs first before doing that. My kit came with 24 pieces, and my door is only 16 panels, so I may use the additional 8 panels to double up on some of the panels. I like the fact that the insulation panels are very lightweight, so they won't put a strain on my garage door opener. So far, the garage seems a little bit warmer than before, and I'm anxious to see how this product performs during the summer.