Did it personally - I had a special event and a very expensive dress that I was totally determined to wear, and because I was in my "stupid" phase of trying everything to lose weight except good food and exercise, I spent the money. There was no plastic involved - it was more like a seaweed-type paste spread all over and then I was wrapped in the equivalent of Ace bandages. And then I basically walked on a treadmill (not with any particular level of effort) for an hour.
And yes, I lost enough inches to fit into the dress that evening - something like 3 1/2 off my hips, and 3 off my waist. It was definitely all water, because I maintained that loss less than 24 hours. I doubt it's harmful, so if you've got the money to burn and are as stubborn as I was - go for it.
However ... with support from the Chickies last year and an acknowledgment that only a lifestyle change was going to work ... I lost enough inches to fit into that same dress any time I want (and it didn't cost a dime!).
