My husband and I have been using this brand massager for at least 15 yrs.  We use it every day to alleviate sore muscles and back pain, as well as foot issues.  This massager has become such an essential in our lives that we bought a spare one just in case the one we use becomes inoperative for some reason.  This unit is well made and lasts an incredibly long time.  If I had the option of giving this product 10 stars, I would.  Try it, you'll never look back!