I went to Dr. Oldenbourg for 6 years. The only slightly off-putting thing is that he is not always there during the teeth cleaning appointment. Often I've only seen the receptionist and hygenist. That said I have had no major problems, so maybe they didn't bother calling him in. He did one filling for me which went fine. Facilities are a bit old (don't know if they've seen an update since the 60s) but seem functional still.