DNA Testing Companies – Pros and Cons presented by Eric Migdal. DNA testing companies will uncover what you might want to know before using any of the DNA testing companies including features and limitations. I will include information about Ancestry, 23 and Me, My Heritage, and Family Tree DNA. I will explain about DNA matches you will receive and ethnicity estimates that are provided after you test. I will cover the differences of Y-DNA, MtDNA and Autosomal DNA testing.