This was an incredible experience and one that shouldn't be missed. I had my girlfriend, who's a nurse, as my tour guide so I declined the audio accompaniment headphones ($6 extra). We got our tix at the box office of Luxor as part of a 3 for $57 deal. Good value as we were able to check out Mirage Secret Garden and Dolphin park as well as the aquarium Shark Reef experience at Mandalay Bay.
Leaving the Bodies exhibit I found a much better Macro understanding of how my own body works and a better understanding of how all the parts fit together and work as one incredible machine. I would recommend devoting at least two hours to this walk through of exhibits to fully take it all in. We took the tour at 5 o'clock on a Wednesday in January which left us pretty much alone with the exhibit which was also very nice.