I have tested with several sites. I tested with FTDNA first believing that dna data base size would be best. Now that I have received results my opinion is a little different. I now believe that both family tree and dna data are important. Another site has more tree data and as a result I'm very happy with the results.

I know the lack and many times no tree data makes results at FTDNA useless. My tree is too large to up load and has not been updated due to the pain required to do so.