While I think transparency is important. It's disappointing that this project attracts suspicion, especially in the light of Kickstarter projects for non essential consumables attracting millions with little to no oversight/transparency.
Watsi have done much more than the average Kickstarter campaign to show where the money goes and who's involved: http://watsi.org/faq#really-100-of-my-donation-goes-to-the-c...
The skepticism or desire for transparency here stems directly from the service they say they provide.
One shouldn't be cynical of holding people to their own standards otherwise the words are meaningless.