I think highly of Dr. Mark Kadden.and his staff! Whether having my appointment at his office at Graybill Clinic at 225 E 2nd Ave #340, Escondido, or while having the actual procedure done at Parkway Endoscopy Center in Escondido, I have found him to pay attention to my questions and answer them in a clear way that I can understand. He has a marvelous staff at both places and exemplifies the adage that "good staff follows good doctors."