OK I assume you have read the reviews and searched this and other sites so I will not repeat those comments here.
New reasons to hate Cal Spa: After 2 years and 1 month I just spent $1,000 on maintenance.
My 2 speed 6bHp pump would not operate in low speed so filtering was done on high with the effect of overheating my tub to 111 if I did not pop the circuit breaker.
And my heater cracked and leaked.
Not what u would expect from a 2 year old tub.
They cheat and scrimp on warranty service after bait-and-switching most buyers to a 1 year warranty. They reimburse the dealer/tech for some parts less than the cost they sell the part to them, with no provision for labor (check heater replacements) leaving the dealer/tech to employ the warranty fine print and charge a "travel charge" to even a local customer in order to avoid doing the job at a loss.
Please do not read the above and assume I am a disgruntled former dealer - I am not - I merely spoke with my service people.
Avoid Cal Spa.