Forget the whiney negative reviews! This had been in my Wish List for 1-2 years. I like Korean Beauty products better than US, and I am American. I've sold US beauty products, I have advertised top of the line US products as my job AND tried them. I like South Korean products for their advanced quality and this is where I first saw this advertized. I have gua shas and jade rollers. I also have my own line of organic homemade/homegrown beauty products. This is absolutely the best all in one product for its purpose, especially for the price, ease and results. It is so easy. Holds a charge quite a long while. USB charging. Perfect size. My ONLY complaint is that the mode button is right where I want to place my thumb when holding it, so sometimes I accidentally change modes. No big deal. I also use this for the red light therapy on my breast tissue now almost 2 years out from radiation treatment for the healing quality in deep tissue. I do not have to go to a spa to get pricey red light treatments or hubby for blue light, or go for special treatments now. It is all here! The massage to stimulate, and the options of deeper stimulation, lift, ant-wrinkle, red or blue light as well helps you customize to get the most out of this. Some people really do not know what they are talking about on reviews. It has just the right amount needed and targets as far as vibration, massage, and heat. I do not know of any product better like this.