I had purchased a harbor fright US cleaner and I used it twice before it burned out. My uncle who was a surgeon gave me a Peltsonic that he bought in the early eighties and used for years. There is a huge difference in the quality of this Peltsonic and the cheap cleaners harbor fright sells. This thirty year old ultrasonic cleaner will last me longer than anything I could buy at HF today. My advise would be to buy a good quality used one.