I used Renshade on the west-facing double glass door to my shed, where I work inside at a computer. I found it successful and as advertised in greatly reducing radiant heat and glare. It's no miracle cure for a lack of insulation, but nor does it claim to be. I was surprised to find that the product feels more like thick paper than like metal. I was expecting a more heavy-duty product. On day two after installation, one of my cats shredded it to pieces and I had to replace it. Luckily, I had some spare, and now I place a barrier in front of it at night when the cats are trying to get outside. On cloudy and rainy days it can feel a little oppressive, but on sunny days it is well worthwhile. It's much more relaxing working without the glare, and I like its veiled see-through quality.