I just recently auditioned for this church gig here in denver and got it. I had practice on wednesday- they told me that I only need my bass because they do in ear monitors for everything. I was kinda sad because I like to feel the bass. So I showed up wednesday and they had a stool set up fot me on a 4x4 platform. It was a vibrating platform. it was ssssoooo sweet- everytime I played a note my chest thumped and my gut rumbled, well I'm pretty skinny so it can't really rumble, but it was better than ANY amp system I have ever played through. and my tone was better than I have ever heard it. Has anyone else used these before?