I did 23 and Me and I was satisfied with the results. I'm not a scientist, so I don't have the knowledge necessary to check their work on a level that can confirm their percentages. What I can say is that, based on my own genealogical research, it matched up pretty well with what I thought. My wife was a little surprised by some of her results, but they matched after doing some digging into her genealogical history. The numbers themselves get pretty specific. When it came to "Broadly Northwestern European" it gave me a 9.5%. It also gave me 0.5% Finnish, so it gets as specific as it will allow. Furthermore, the specifics of region are there for the larger numbers. For my 21.1% French and German, it gave me the regions that my ancestors were from. If you're thinking about doing it, I can definitely recommend 23 and Me. There are other features, as well, such as linking you with other blood relatives and things that you're disposed to genetically.