I would only add that I have generally gotten a higher response rate to my inquiries to my matches on Ancestry.com than on FTDNA, plus a much higher percentage of my matches have trees posted on Ancestry.com than is the case for my FTDNA matches. Yes, some will complain that much of the information on those Ancestry.com trees may not be entirely accurate but I don't see why the same wouldn't also be true for trees posted by people on FTDNA or on any other site.