Here's my 5 cents;
I sat down on a chair with it once listening to techno. It was cool, but not worth my investment. My friend says he loves it, because it's like being at the club.
Just like some theaters have the option for D-Box chairs to feel like you're in the movie. I didn't feel I was in a club. I somewhat felt the resemblance, but to me I need the ambience too... also, all clubs sound different.