I was an early adopter of 23andMe. Years later my dad did it and also my sister. I'm glad I did. Turns out, based on our DNA, 23andMe thinks that my dad's probable relationship to me is "father" and my sister's probable relationship to me is "sister." We are all mostly Northern European, with a significant amount of Central European, and a microscopic amount of "broadly East Asian," which I am inclined to guess is due to Gengis Kahn. I think it's good to have that sort of thing available to you as an option, if you're curious about ancestry. Also, knowing various genetic health risks is a good thing, which I wish I had taken seriously before I had that fucking heart attack. edit: BTW, my ex-wife did 23andMe recently, and she found out she was 1% African. Now my daughter is afraid to do it.