640 direct ancestors in 6 months is good providing that it is documented, otherwise it is not. Also it is good if you have not just found the bulk of it on line in other peoples submissions to ancestry.com; genealogy.com; Familytree.maker etc. or simply extracted data from the IGI or Ancestry File at your local Family History Center. Genealogy is good when one does the actual searching in books, archives, cemeteries, church records, court records, and correctly documents the information. It is also good to look for and find more than one evidence to prove each event, name etc. Furthermore in doing genealogy where German ancestors are involved one needs to learn enough of the traditions, culture, history of the locations where the ancestors lived. I am now 68 years of age and have been collecting names,dates and events since I was about 22. I began doing genealogy seriously in 1979. The research of the STROH family in European records was much easier for me than the American genealogy for the descendants of the STROHS who came to America in mid 1700s, because what I found immediately were two books both containing incorrect information on who the earliest STROHS were, where they came from, and how they were connected to each other. I soon found that in order to exchange information with the people who I made contact with required me to disprove certain information in both of those books. But since many family historians in the U.S.A. and possibly Europe as well tend to take everything in print already as the undisputable truth it is not easy to convince them when certain published information is not correct.