who has had experience with the dynamat...it seems to be more expensive...is it really worth the extra bucks???  

.... "vs. tar paper"  

i've put dynamat in my car. i like the way it works. it cuts heat and sound real good. i have also used cheaper stuff in other cars. and with cheap you get cheap. there are probably some good ones down they pay scale. but dynamat is really good. just remember that when you use it. when you stick it down it stays stuck. so be careful. mistakes with it will be expensive.