This stuff would probably be best suited for a speaker that vibrates, or a subwoofer that rattles anything that isn't bolted down in your car.  It's very site specific, and there can be some tinkering involved if you have trouble locating the exact cause and source of the noise you're trying to eliminate.  The price ain't bad, provided you only need a small amount, but this could quickly add up and be quite expensive, depending on your need.The good thing, is it does NOT have a funky industrial smell.  In fact, it doesn't smell like much of anything, which is a huge bonus, since materials like this can downright stink to toxic proportions.I had a creak in the passenger side of our car, under the seat, and this helped dampen that a tad. Prolly it could have been applied better, but it's good enough for me.  I placed the excess under my Bi-pap in the bedroom, and it really helped cut down on the whirring noise, which reverberated on the shelf it's sitting on.  So for that purpose, it worked pretty well.The sticky backside has plenty of adhesive, however, the material itself is quite thick and stiff, so the adhesive often doesn't stand a chance of holding it down on uneven surfaces.  It sticks, just not always well, or exactly how you'd want.The black rubbery kinda mat does seem to rub off a bit and leave black marks or scuffs -- or at least that's the impression I was left with, given the black marks it left inside the product packaging.  Seems like this is the type of stuff that could melt  and decompose a bit in heat; or at least get a little soft and gooey, like tar.It's pretty stiff, but is somewhat pliable too.  It can be hard to cut to specific shapes. There's a perforation down the center, so clearly they intend this to be used as 2 pieces.  But again, you could cut it to size with a really tough pair of scissors, or a box cutter.Overall, this stuff is pretty good for specific applications.  Just be prepared to work with it to achieve your perfect result.  A tad costly if you need a good amount.  But it works well enough.