People who are new to DNA testing can be overwhelmed by the medical and biological mumbo-jumbo. It is hard to understand what you're paying for, how it works, and what you'll really find out.
A very nice guide, easy to understand, is Richard Hill's DNA Testing Guide, "How to Identify Ancestors and Confirm Relationships through DNA Testing."
http://www.dna-testing-adviser.com/DNA-Testing-Guide.html
And, when you get your test results, don't forget to add your most distant ancestor on that line to the right DNA project on Geni.
