So we bought the infinity hot tub by Coast spas earlier this year and we use it at least twice a week this summer. So far no maintenance problems and it has really changed our life. We often use it in the evening before going to bed during the weekdays and on early morning days now that the Fall is here. My favourite feature is the app, you can adjust the water temperature, set filter cycles, activate jets, toggle lights on and off even before you step outside.
I would definitely recommend Coast Spas to anyone who is interested in upping quality of life. Happy with the purchase.
I can't think of anything negatives so far.