What Home Depot insulation have you used under your carpet?

I've use this from Home Depot on 2 cars. Happy with the heat and noise reduction. And it's pretty cheap.It took 4 rolls to do my 68 barracuda from firewall to tail lights.
E/O 12 in. x 15 ft. Self-Stick Foam/Foil Duct Insulation-FV516 - The Home Depot