[xmodem]

I did 23andme earlier this year for the health information. After much deliberation about the privacy risks, I decided the tradeoff was worth it.

I looked at the family tree/genealogy data as well, and I was stunned how many of my close relatives were in there.

It does depends on exactly what your fears are about how the data will be used, but to some extent the ubiquity of these services means the privacy of your genetic information has already been violated regardless of wether you choose to use them yourself.