I've used Dynamat and B-Quiet. B-Quiet was junk, in my opinion. It did not stand up to the summer heat. It just melted and slid down all vertical surfaces I put it on. Was a major PIA to get off and all areas cleaned up to put on Dynamat extreme. B-Quiet is based on asphalt, like Dynamat orginal. Dynamat extreme is based on vinyl tile, which works much better. I will be using Dynamat products in the install going in my new truck.
John