Dr. Paul Appelbaum in San Jose Mercury News

September 8, 2014
Blurb
 The brainchild of Anne Wojcicki, the wife of Google co-founder Sergey Brin, 23andMe began in 2006 as a startup mailing DNA testing kits to customers' front doors and asking them to mail back a vial of saliva. Eight years later, the company is the gatekeeper of a database of hundreds of thousands of people's DNA -- a self-described Google for genetics information...

Some research experts also question the accuracy of 23andMe's data, which it collects through surveys it sends to customers, asking about their family and medical histories.
The validity of these studies "is going to depend on the accuracy of the medical information in 23andMe's database," said Dr. Paul Appelbaum, director of the Division of Law, Ethics and Psychiatry at Columbia University. "The information 23andMe has is exclusively self-reported, so how accurate it is will become a critical point."
http://www.mercurynews.com/business/ci_26482729/23andme-aims-be-google-genetic-research