The Blue Diamond worked ok for about 1 year. Then it started having problems stopping against a wall and never moving. Over the past 2 years I typically have to send it in for repair about every 2-3 months. It is very frustrating and is not a reliable cleaner. I will not purchase another Blue Diamond.
ADMIN REPLY: Actually, I think the reliability issue may be with the repair shop. It sounds like a drive belt problem. These machines have a pump a motor and the same belt drive system as Aquabot.
I truly believe the machine is not being adequately repaired.