@roxsana9 , I also had a bad experience with my Smart Vest. I am dealing with five compression fractures on my thoracic spine. The pain is constant, my doctor scheduled an ablation for next month. After several MRIs and a good medical history, there is not doubt that those fractures were caused by the Smart Vest. It also made my Spinal Cord Stimulator hyperactive. This was causing very painful electrical discharges and jolting. I did have to turn off my SCS , I am so afraid to turned it back on because I don`t want to experience those spasms again. Please be careful, do your research, talk to your doctor and if you have osteoporosis or other condition that affects your thoracic back, DON`T USE IT.