I've been at this over 20 years, since the birth of my son. The way I do this has changed considerably, not only because of technology. My interests have gone way beyond just my son's ancestry, though that's quite a task [Scotland, England, France, Germany, Holland, Mauritius & South Africa]. The degree of rigour varies with how important it is to me. So there will be errors, thousands no doubt. Caveat lector.
Of course, additions and corrections most welcome