There are a good deal of misdiagnoses that cause more months of suffering, especially with diseases like Crohn's disease. Maybe a service like this could prevent that with the help of a more accurate up front diagnosis. Diseases aren't as rare as people tend to think (~1.5 million with a digestive disease in the U.S. alone).

That said, here are a couple things which make me skeptical about this:

1) They make claims involving rounded numbers without sources, such as "50% of second opinions contradict the original diagnosis." That's a red flag for me. Would be nice for me to see some sources for claims like that on a site wishing to sell medical research services.

2) Several of the medical researchers do not have a background in anything medical. In fact, one of the senior health researchers' area of expertise includes herbal medicine and Naturopathy (which is a bit anti-vaccination: http://en.wikipedia.org/wiki/Naturopathy). I would not be happy If I got suggested any alternative medicine remedies for my disease at the cost of $5,000.