I have chronic lower back and shoulder tightness. Dr. Roy Jackson always gets knots or is able to crack it out. He will use a electro stimulator to warm up the muscle and then does the adjustment.
They accept my health insurance plan.
They are located on a busy road. But there's plenty of parking in the back when I usually go after work.
Dr. Jackson also gives good as advice so you don't have to visit his office too often.