I had one near my house at a festival when I was young and rode on it 3x a day until the festival was over. The guy eventually let me ride for free to get other people to want to do it too. I was in Mexico a few months ago and rode on one inside a club because it brought back those fond memories. Wasn't as fun after dinner and wine. Good thing I stayed away from the tequila and the ??? tacos.
If I had the $ I'd totally get one. Inversion table is definitely more reasonable though :)
BTW S.C., I just read your post in the rawveg forum on sweet potatoes and I had such a craving I tried making it how you suggested. I really enjoyed it!