I love this hot tub!!!
I live in Maine, hot tub worked fine last winter even through -25 degree days. This year I insulated the outside with 1 1/2" foam board, the hot tub is outside, but protected from wind, I have a Kill-o-Watt on it now, it is January, $36 to heat it for this month!!! Two years old and I just replaced the Ozonator. I use 1TBS of Chlorine and 1TBS of enzyme after every use and clean as can be. I'm not sure how much better an expensive hot tub can be but I'm very happy with this one.