This is a tough one to rate because the sales people treated me well and gave me a good price on the spa. It's the after-sale service that I was unsatisfied with. First, the spa is supposed to come with a silver ion cartridge, but it was delivered without one. I didn’t find out about the need for the cartridge until I went thru the water-quality adventure I describe below. When the spa came, the delivery people gave me a (very unprofessional-looking) list of instructions about taking care of water quality. BUT THEY WERE INCORRECT. I’m using Silk Balance, a product that costs $200 a bottle, and the instructions the delivery people gave me make it ineffective! If I hadn’t later found another flyer in the box of chemicals I received and saw that Silk Balance required a different procedure, I would have wasted the Silk Balance and most likely had gunky water. Plus, you need to add a “shock” treatment to the spa each time the spa is used, but the delivery people’s instructions didn’t mention that and there wasn’t any shock chemical in the products I received. As I tried to figure out what I was really supposed to do for water upkeep, each sales person I talked with had something different to say. I finally got in touch with Trena at the company’s service center, who let me know the right way to take care of the spa and sent out the silver cartridge and shock chemical. But by that time, the spa water wasn’t looking very good…I may have to drain it and start again…not happy about that. I will say that the people at the service center were very helpful and did seem concerned about what happened to me, so hopefully they will fix the situation. But I still have to advise people to check with Trena or someone else at the service center before they get their spa, so they’ll know they have the right instructions and chemicals.