2nd Gen Non-Engine/Transmission R-blox sound deadener

[telliott]

i've been wanting to throw some sound deadner in my cab for a while now and have been debating back and forth on what to get. Had myself convinced i would probably do the cheap stuff you get from the hardware store. However, i found this stuff on ebay called r-blox, 80$ for 100 sqft. i think thats cheaper than the hardware store stuff, and i would think it works better. Anyone use this stuff?

http://http://cgi.ebay.com/100-sqft-R-BLOX-Sound-Deadener-Dynamat-Sample_W0QQitemZ280435638994QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item414b4442d2