In an abstract published in 2007 in the Journal of the American Academy of Dermatology, a company-funded, 10-person study found the Clarisonic was "significantly more effective" in removing makeup than using soap and fingers.
Many of these podcasts seem to deliver nearly identical information to the journal (essentially serving as a headline and abstract reading service), and when additional information is offered (such as author interviews), it tends to be dry and only intermittently intelligible.