I first became acquainted with the Sound Vitality company over twenty years ago. My mother bought the equine unit for our horses. Approximately twelve years ago, I tore a muscle in my shoulder. It was very painful and I couldn’t lift it or move it away from my body. I was told after an MRI that I would need surgery. My mother brought me her machine and within two days, I could lift my arm out and away from my body and above my head. I got a cortisone shot and avoided surgery. Needless to say, I bought one and will never be without it. My mother and I recently purchased two of the newer model, the Infratonic 9. My dad uses it for restless leg syndrome. I am using it on a dog with an enlarged heart to move fluid and also on a hurt horse to repair damage from a severe cut. Needless to say, I know it works and anyone who tries it will never be without one, especially if you have chronic pain and you find relief. With a thirty-day guarantee, I cannot believe anyone wouldn’t try it. It REALLY works.