This started out to be a great machine; with a 90 min. cleaning cycle it cleaned the pool nicely. However after less than 3 years use it stopped working. I sent it back to the company and after some confusion about the correct place to send it, they fixed it and sent it back and it was still under warranty. That was last year. Now I am having problems again, as it starts and then shuts off after 5-15 minutes. Would not recommend this machine in the reliability area.