I've used:
Second Skin -
http://www.secondskinaudio.comFatmat -
http://www.fatmat.comand Dynamat...(not worth the $$s IMO)
from the looks of it, the Bquiet stuff is about the same (actually thinner by measurement) as both
Fatmat and Second Skin but comparable....
I did a test to check them out as far as adhesion to a surface and a Cold/Hot cycle of Colorado weather..(to see if either fell off)
neither had a problem... (neither did Dynamat back when I used it..)
I went with Second Skin, and have used it on my Van... (did one door first) noticed a huge difference in the sound from the speaker in the door... I haven't been disappointed with the Second Skin and it will be going in my Fiero (right after I finish POR-15ing the inside..)
Anyways there are 2 more alternatives..
-Darius