USVI-On-Line

While surfing around the information I have found here, I found a link to this BOB thingee:

http://www.bobunderwateradventure.com/

I was wondering if anyone here had done this. It looks like a lot of fun, but I can't see where to find out what it costs and if it is worth it. It looks like it would pretty much be a whole day thing, and I wouldn't want to waste a day in USVI if this wasn't as good as it looks.
Any comments out there?