It is a lot cheaper first of all.. that makes it a lot better to some people. Chemically, it is nearly identical to dynomat, however, it is stickier, which makes instalation much easier, and the owner of the company will answer any questions you have directly. no waiting for automated responses like with dynomat. if you have more questions let me know... here is the price breakdown...
Dynomat ~ $250 for 32 feet
RAAMat $99 shipped for 60+ feet... ( i dont remember the exact sq footage, but I know its over 60..)
Dropping my name might even save you a couple bucks more, but I cant promise anything.
