mine heats way too high on low [SEP] the space saving feature of this foot spa is its main benefit and it s a great heat low medium or high for the power on or offwhat is missing is bubbles only i could not find a way to use the bubbles without heat if low heat had been comfortable then perhaps that would be a compromise but after about minutes low heat was so hot i had to remove my feet because it was becoming very painful i cannot imagine what medium or high would do i do not know if the unit i received has a defective thermostat if not then you won t like heated water unless you re after the boiled lobster effect for your feetinasmuch as i can t opt for bubbles without the heat the only benefit to this foot spa for me would be the rollers across the bottom they feel pretty darned good and the space saving aspect as compared to my non electric basic foot tub