Absolute junk. 1st one I got ran a week, 2/3s full just fine. Started the rocks on grit 2 and it ran for a day and quit. After cooling for a few hours it would start back up, but only run for few minutes. Emptied the tub down to 1/3 and it would run a little longer. Contacted cust. srvc. After a few pic and videos they agreed to send another. Their 1st offer was a $20 refund, which I declined. When the 2nd machine arrived I tried it with the tub 1/3 full. The new one shuts down even quicker than the original. It's motor is far weaker than the 1st one. I gave up. Wasn't going to spend weeks corresponding with cust svc, taking more pics and vids, again.