I was interested in the Temptrol fabric when I ran across it several years ago, but immediately had concerns when I read the claims on the website. The website is brimming over with pretty juvenile misrepresentations, and it gives the impression that the manufacturer's business model includes exploitation of people who lack a science background.
But, I decided that the material itself might prove to be worthwhile, despite the sleazy company, so I looked into it a bit more. A quick google search turns up many unhappy customers. The aluminum coating comes off almost immediately. One of these accounts can be found in a thread on Hammockforums:
Polypropylene has too little surface energy. Plasma treatment of the substrate and ion sputtering (not vapor deposition) would be required in order to get a good aluminum/polypro bond, and those processes would make the price prohibitive.