My first experience with radiant barrier was back in 2005 when I installed it in the attic of my son's 1915 bungalow in Houston, TX. I bought it at a local home improvement store and it was expensive and flimsy. However, it really helped keep the house cooler. Later my son purchased radiant barrier from AtticFoil for two other properties he owned and was impressed with the quality. So, when I decided to install radiant barrier in our 1972 2400 sq ft rancher, I checked the web for various suppliers, but AtticFoil stood out and so that's where I bought it. Shipping was quick and I was really pleased with the tough, heavy duty quality of Atticfoil's product. Since I was going to install the foil by myself, I went with the 26" foil installed parallel to bottom of the rafters. For installation, I bought a Surebonder pneumatic stapler powered by a two gallon air compressor with a 50 foot hose and used 1/4" staples. Believe me, a pneumatic stapler is MUCH easier to use than the manual stapler I had in 2005 although if I had it to do over I would also purchase a more flexible air hose. As recommended in AtticFoil's video, I precut the foil to length and carried it into the attic, and that was much better than trying to cut it in the attic like I did in 2005. I also cut a 4' x 8' sheet of 1/2 inch plywood into four 2' x 4' pieces (and cut one of those into two 1 x 4' pieces) to move around and place over the joists to provide a working surface. I couldn't have done the job without them since our house only has a 5 pitch roof and is just 7' high at the peak. I worked in February when it was cool, but it was still nasty, dusty work. I used up three N-95 3M masks over the two weeks that it took me to do the job, and much of the time I was in awkward positions working on my back with the rafters inches from my nose. In addition to the low roof pitch I had to work around rigid metal ducts, gas pipes, electrical junction boxes and 2 x 4s randomly nailed to the top of the joists. So, it was a commitment, let me tell you. But it was worth it: I carried some suitcases up to the attic yesterday and took my infrared thermometer along. It was a sunny day in the low 90s and the deck temperature at the peak (where you leave a 6 inch gap for ventilation) was 140F while the foil 6 inches away was 100F, i.e., a FORTY degree difference. The top of the insulation measured 98F. In additional, our A/C definitely runs less often than in previous years. In conclusion, I am 100 percent satisfied with AtticFoil's product, their instructional resources and the huge improvement the foil has made in decreasing attic heat gain.