PearlandDotCom : I used Ancestry DNA, pretty dead on. Seriously thinking about using another DNA company just to see if I get same results.
@Sophie1 : I have tests of immediate family at all three testing companies. I also have a cousin that has our common paternal line tested. Between the two of us we manage roughly 50 separate DNA kits (roughly 20 are mine) across all three testing sites, plus third party Gedmatch that accepts all three (Ancestry, ftDNA, and 23andme download data).
I can most assuredly say they are as accurate as you can get!
I also have tested my own DNA independently at all three sites, with their various kits, and got the same results.
I tested my father at Ancestry for autosomal, and again at ftDNA for the big Y, as well as my son on both.... basically the same result with minimal differences.
I also tested my mother at Ancestry for autosomal, and ftDNA for mt full sequencing - again, basically the same result.
I have vetted the DNA accuracy to the best of my abilities and am happy enough with it to invest quite a bit of money into it.