The CleanMAX is an updated version of the Roboclean. It adds the lights in the water basin as well as the Ionizing mode during air-wash. It has a 9 speed, double fan motor. It sounds like an old Compact running. Not shrill at all. They are sold by distributors like Rainbow, etc. There are so many people who bring in Rainbows for service that can't be fixed (no parts availability), that it should be easy to sell the new CleanMAX.