We absolutely cannot say enough positive things about Dr Sierk and his staff. They are kind and thoughtful, professional and thorough. Once, we had a retainer emergency and the technician, Terri, met our son at 9:30 at night to take a dental impression so he would have a replacement retainer as early as possible the next day. No charge, just a friendly smile. Our daughter has just had her last official appointment, and we can honestly say we will miss our visits to the orthodontist's office!