Yes, I have been using it a while. Theresienstadt was the only concentration camp to issue death certificates, albeit with completely fabricated causes of death. My 2 great-grandparents' death certs appear here. You can also send them a photo to post on the person's record, which I did for Julie Schwarz Hahn, my g-grandmother. Another website that is proving to yield new info and people is Projectheart.