As many other people probably did, I stupidly purchased these thinking they would "sound proof" my room. They didn’t do that, of course, but they did offer some insulation and absorbed some of the sound (my room had hard wood). The difference was noticeable and my room didn’t echo as much, which made the purchase worthwhile. After more research, I learned they are useful to set up a recording space, where you don’t want much standing noise. Good product, especially for the price. Be realistic though, they wont soundproof your space. Know what you’re buying and you wont be disappointed.

These do the job. I had no problems with them and right away i noticed a difference.
This product comes pre-cut so i’m guessing that where the price comes from.
but if you really want to cut your own i would suggest getting [this](http://www.amazon.com/Acoustic-Thick-Wedge-Style-Sheet/dp/B003FZD3QK/ref=wl_it_dp_o_pC_nS_nC?ie=UTF8&colid=5BQB62SCB990&coliid=I17K7A04Z4Z7HO) instead. I think they are a better deal.
Overall i’m happy with this purchase, they do what they say and that’s all that mattered to me.

these are nice! need more though to really make a difference! these look really nice but the only true flaw is that they smell bad for a bit. small thing though! purchasing more