Some chiropractors are amazing, most are questionable. I was in a motorcycle accident, one leg is now shorter than the other. I used to hike a lot, but back pain grew worse and worse. Went to an orthopedic doctor, he literally said "that is the price for walking on two legs", did nothing to help me.
Started going to chiropractors, since I could not sleep at night with out horrid back pain. After 10 different chiropractors, I finally found a good one. He practiced something call DNFT (directional non force therapy). No cracking of the back or neck. Just gentle pressure on different parts of my spine. Amazingly it worked wonders! I go back every 5 years or so for a tune up. Its black magic but it worked for me.