I agree with most of the replies to this string that very often the data collected by commercial genealogical companies is useless. Therefore, I have not bothered to be a member of any of these companies. My experience regarding my own collection of genealogical data (based mostly on official documents) is rather irritating. My data has been leaked to two such companies without my permission, and one of them is keeping sending me (via a family member) "new matchings" or "supplements" which most of the time can be characterized as rubbish. I would advise anybody interested in collecting reliable genealogical data to treat with the utmost suspicion anything these commercial companies are responsible for.
Prof. Isak Gath MD, DIC, DSc
Faculty of Biomedical Engineering Tel. Office #972-4-8294115
Technion Israel Institute of Technology Home #972-4-9835704
32000 Haifa, Israel