I have had this spa for two weeks now. I selected this model because the spa is located on my houseboat and I didn't want to run 230V to it. Heats up in about the time the specifications say, however, when using the spa in cold weather, the temperature will drop about 2 degrees per hour - even faster with air coming through the jets. My 230V spa at home will drop about 1 degree an hour under the same conditions.Pros: Good value, like the outside walls being molded not wood, can hold six adults, light weight when empty.Cons: Heater can't keep up when using it in cold weather.