I held off on buying these when they first became a thing because I didn't think it was that useful and boy was I wrong. I was once a licensed massage therapist and already owned quite a few massage guns. The bob and brad is pro the best (and a fraction of the cost). I've had the theragun, hypervolt, kraft, etc. The percussive therapy increases blood flow to the area, improves range of motion, gets rid of lactic acid build up in the site, and essentially aids in overriding pain signals to the brain.