aaron, if you look closely at what they are selling, you will find it is not much cheaper at all than auralex. you get (in 2" studio foam wedges), 44 1 ft by 1 ft panels for what, $75? that is 44 square ft. if you buy a box of auralex, this includes 96 square ft in 4' by 2' panels for $179. you do the math! 44 x 2 = 88 sq ft for $150
auralex per square ft = $1.86
homestudiofoam = $1.70
plus i recomend you read their installation tips page.
"WARNING: Keep away from flame sources, polyurethane foam can burn. It is impossible for us to keep up with all local building and fire codes. Please check locally about such codes before installation, especially for public buildings such as hospitals. HomeStudioFoam is not "flame-retardant".
Cigarette smoke, sunlight, fluorescent lighting, and heat may cause discoloration or fading of foam (all brands of foam).
Mount the foam away from direct sunlight, the sunlight will fade the color over time.
Do not open near computers or other sensitive electronic equipment. Potential static electricity build-up during packaging and shipment may cause harm."
although it is impossible to make a totally fire retardant foam product, auralex is probably the safest, as they try to keep up with fire codes. auralex does not fade, crumble, or rip easily. also, it does not create static electricity. hhhhmm! i think i will stick with auralex! you get what you pay for!