I have had one for about 20 years. You will use it for the 1st year or 2. Then it gets old. As for who sells them get one from a larger company. The one I have was from a place call or was called Spas-direct. It is basically a cabinet and fiberglass tub with generic components. Don't get me wrong it works great and has 2 5 hp motors and about 100 jets but the company and follow through gave a lot to be desired. Make sure you get one that has a circulating pump system so it doesn't have to fire up the pump motors to heat the water. Other than that the sky's the limit. I know a little bit about them so feel free to ask.
We had a Hot Spring Spa at our last place that lasted well over a decade with super minimal issues (I think I replaced a small control board once). Loved it, I nee dto get another one LOL
I have a hot tube but it needs a new controller, anyone know any repair guys? I don't mind dumping ~$400 into it or so but if its much more i'll buy a new one.