I have never seen Dr. Greenawalt but I highly recommend Dr. Paul Green. I was having lower back pain and neck stiffness and he has helped a tremendous amount. They did the x-rays in office before adjusting me. He did want me to come in often (1-2 times a week) for the first couple weeks while he tried to adjust and correct but then he started having me come in less and less. I liked this because some chiropractors will try to get you in as much as possible so they can make more money. The appointments are always on time and the office staff is also very nice. My back and neck have felt much better!