Johns Hopkins deal: Metabolism test/Session with dietitian

Saw this deal on LivingSocial: http://www.livingsocial.com/cities/23/deals/457912-metabolism-test-and-session-with-dietitan

Anyone else getting it or had experience there with weight loss management? Do you think it is a good deal?

I've had my body fat tested on the little handheld thingies but I think it would be cool to try a more accurate machine.