When I used to book shiatsu massages with a masseuse , I feel great afterwards but within 1 hour I feel the knots coming back. With this massager, I was surprised to find how well it works. I used it mostly on my neck and a little on my lower back and shoulders. Not only did the muscle knots disappear but the relief lasted for 3 days afterwards. I was really pleased. I've used this massager four times now and when I try to use it again, it quit working. It would not power on at all. I checked my outlets and they work so it must be the shiatsu massager that has failed. I received this product around the of March of 2023 but it was for a gift to my boyfriend of 7 years. He said that he doesn't like massagers so he gave it back to me. Unfortunately, the window to return this item with past by then. This is why I only started using it in the last couple of weeks. I'm annoyed and upset about the poor quality and the unreliability of this massager It's rare that I post reviews but I felt customers need to know.Update: from 2 stars to 4 stars- my BF got it to work again but not sure how since he literally plugged it in and pressed power. I'll update again if anything changes. Another update: the massager is working reliably now. I think there is an auto shut off but I can't tell. It. Just will stop after about 15 minutes but it'll start up again if you press power.