Anybody do any business with this operation?

Yeah, generic Auralex is about what it is - but it's not as dense, either. Acoustic foam is not what you really want to use for acoustic treatment. It can help tame flutter echo, but doesn't address the low-mid and low frequencies.
I got a 'seconds' package of foam (4" wedge style, not egg crate) from them on ebay for $25 ($1 a sq ft, how could I resist!) I put it up in a few places where there's no space for traps, figuring it couldn't hurt. I also cut the 'points' off one square and then cut it in half to put my monitors on, for separation from the shelves they're on.
 
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