Dr. Guttenberg repaired my damaged, infected sinus and later successfully installed implants to restore my smile and chewing ability. He succeeded where another dentist had failed. His sophisticated electronic equipment and surgical skill gave me confidence that the outcome would be successful, and it was. Plus he's a nice guy. Although payment was due after each treatment, his staff immediately submitted the proper claim forms to my insurance company (getting them to pay is another thing all together!). His prices were in line with other top oral surgeons in DC and definitely worth it. I have nothing but good things to say about Dr. Guttenberg.