The testing is fairly simple: You receive a test vial (log in and register it on their website) and provide saliva up to the control line. Make sure you don't eat or drink for 30 to 45 minutes before providing your saliva sample. It is best not to brush teeth beforehand since it will wash away valuable DNA and you want to ensure your sample has enough to process. Yes I had a few failed kits in my life and that set us back months of getting results on those kits. Anyway it’s fairly simple to provide the saliva samples. Simple enough I had my 5 1/2 year old done and she was the easiest one to process. Then you place the kit back into included return envelope and wait for about 6 to 8 weeks for it to process. All while keeping tabs of the process online as each step finishes.I have tested both of my parents, my two children, two paternal aunts, my daughter's paternal grandmother as well as myself and two cousins whom I tested to confirm our relationship. If you test at least one parent, you can easily sort matches that are shared with that parent to determine which matches are maternal and paternal. Since both my parents have tested mine literally shows who matches me from each side and my children can sort their matches based on me being tested too.My paternal grandfather died in 1995 and took with him the secret of his past. He had ran away as a young boy and changed his name so we knew him only by the name he had taken. My family always yearned to know more about my grandfather's past but he had endured some sort of trauma or something and for whatever reason chose to never speak of it again. So we grew up only knowing half my father's ancestry - that of his mother.After my grandfather died, I set out on a mission to try to figure out more about his identity. I sent off for birth and school records but hit one dead-end after another trying to prove he was who he said he was. I spent hours going over census data on Ancestry's website, writing to courthouses across the country. The evidence pointed to the conclusion that he was not who he said he was. I had nothing really solid to go by. Until 17 years into chasing cold trails, I discovered ancestry type DNA testing. I figured it wouldn't hurt to order my dad a kit and see where that would take us. If I could just find one close enough match then maybe it would give us a good lead on figuring out my grandfather's real surname.After waiting for what seemed like months (it was actually only about 6 weeks) my dad's DNA was online (on 23andme’s secure site) and accessible along with all his many matches - which were basically cousins at various degrees of distance. It was one cousin (a predicted second cousin) in particular that gave me access to their family tree and actually dove in with me searching for clues that would lead us to my grandfather.Just 6 months into researching my father's DNA, I found my grandfather's family and figured out who he really was. I wanted to ensure that my information was correct and so I contacted the daughters to the man I believed to be my grandfather's brother and offered to test them both. Their test results confirmed they were indeed our 1st cousins. I have since been in contact with close and distant family via this newly discovered paternal side and even obtained a copy of my grandfather's family surname book. His absence was even recorded in the book! I solved an 83+ year mystery and gained a family I longed my entire life to know about. I cannot be more thankful that these tests are available and that it gives us such ability to solve things that seem impossible.Granted this all sounds way easier than it was and in all honesty it took planning and sorting and meticulous record-keeping to rule out my father's maternal matches. I literally mapped my father's DNA and researched every match labeling in an Excel document, which chromosome location that relative fit and what surnames fit within those matches. It’s given me new found respect and interest in knowing about each and every ancestor that left their mark within our DNA. It’s time-consuming, rewarding and addicting. I can say that with all honesty as I now manage 15+ kits on various DNA websites. I tested myself and both parents on 23andme as well as AncestryDNA and Dad was also tested on FTDNA but I met my most useful matches on 23andme. It was on 23andme that I found the best ability to pour over chromosomes - researching every detail I could.Oddly between 23andme and Ancestry their tests show a discrepancy in ethnicity estimates. One shows that my dad has a tiny trace of Native American (23andme) yet AncestryDNA does not show any trace whatsoever of Native American. My son has confirmed Native American and was only tested on 23andme and his percentage came back at nearly exact what is on his BIA blood quantum card. So I lean in feeling more comfortable with 23andme’s ethnicity estimates.IMPORTANT TO NOTE: You can take your raw data (once your DNA is processed) and download it from any of these DNA testing sites and upload them to GEDmatch for free. That site allows you to cross compare matches on there from all the DNA sites. As long as others have their data on their too you can look at those matches and even see where the match is on individual chromosomes, etc. It’s a great tool to utilize along with your DNA testing sites.FINAL THOUGHT: If you are looking to solve a mystery, 23andme is great. If you are looking to just fill in a family tree and you have a paid Ancestry membership or you are willing to pay for it, I would also suggest AncestryDNA. AncestryDNA gives you immediate access to your matches’ trees and you can in turn build on your own tree with the information. But if you are NOT a paid member to Ancestry, their AncestryDNA features are limited. I personally think its poor business practice for Ancestry to force people who already fork over money for the DNA kits to further pay to utilize services that should be totally included within the purchase of the kit. With 23andme, there are no additional hidden usage fees.Whichever one you choose, be prepared to discover a new you.