Has anybody used products from HSF Acoustics? Prices seem to be very reasonable and there before/after sound clips show amazing difference when applied. I see they also have an Ebay store.

http://hsfacoustics.com/studiopacks.htm

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85