I agree whole-heartedly with Richard Perrin Day's assessment. When I find info on One World Tree my source citation reads: Ancestry.com, One World Tree; this information has not yet been verified against any other source. Once I verify it, I put the source and delete the One World Tree citation. I think we have to take the good with the bad and use One World Tree as a starting place only. It is pretty easy to tell right away if the info is good or bad. I went to the National Genealogy Conference in Raleigh a few weeks ago and met all the people at Ancestry.com. I think they are doing amazing work and they really appreciate all the info we give back to them.