I've been having back and leg pain for over a year. I've been to two physical therapists on referral and my pain over time would not improve. At one point, I had difficulty walking the following day after a session. John Kwon is the first therapist that emphasized my biomechanics at home and at work where I sit most of the time. He uses a three tiered approach that requires help from my doctor, himself, and most importantly myself to adhere to the proper biomechanics daily. I concur with the other writer that John spends much more time with each patient, typically 30 minutes compared to15 minutes. In addition, he has been hands on with communication with my doctor and was instrumental with the diagnosis of my pain source (L5,S1) based on his physical findings. His staff is very pleasant and caring, and I find them very different than other physical therapy outfits I've been to. They are very diligent in making sure that I am doing my exercises correctly and using my core rather than other muscles that may aggravate my pain. They also check to see if my pain is acting up and will tell me to stop if anything feels worse. With my other therpists and aids, they would seldom check, and would not give much advice of maximizing the benefits of the exercises, and would not challenge me enough when things were getting easier. John has been continuously adding exercises as I am getting stronger. I felt about 30% relief just after two visits, and continue to improve over time. John is very understanding and supportive of his patients and really care. He knows how we feel, since he had experienced many types of pain himself. I would highly recommend Core Performance, John Kwon and his staff are the best in town!!! You don't need to look any further.