I had pain in my upper jaw which was preventing me from sleeping at night. I called Dr. Hsu after hours as an emergency call. Dr. Hsu was very kind and caring on the telephone, scheduled me to come in to the office next morning. Dr. Hsu took his time, using his lifetime knowledge and expertise to diagnose and identify root cause of the problem. Same day Dr. Hsu scheduled a root-canal operation on one of my upper jaw teeth. Operation was completely painless and result were fantastic. No more pain from my upper jaw and I can finally eat and drink using my left side of the mouth. Dr. Hsu is a keeper in my book. As a matter of fact, my wife and both of my kids are now patients of Dr. Hsu. Thank you!