Not really scientific. Also, I have seen their product and their methods sometimes leave quite a bit to be desired.
A few years ago I did their test. The results have been odd to say the least. At first I had a plethora ethnic ancestors. But then the results kept getting changed. My native American covers the entire Americas while my African has moved from tropical to Sub-Saharan to north African. And my Hispanic became Iberian. Their results have been very malleable.