First, we ordered with 2 day shipping in Mid-Feb 2021. Not only did we not receive the hot tub in two days but it took nearly 10 days and a second order! The company was responsive but very speculative. We bought this in late February and after finally receiving the item; we set it up and got to using it straight away. For a week, the purchase seemed very cost effective and we were thankful. That did not last long. It is now March 31st and we keep encountering an E90 error. We have received the error notification about a dozen times in the last 3 weeks! The heater overheats, shuts down and days go by before we can reheat to use again. This is a drastic waste of money. We have purchased new filters, new pumps, researched changing of the items, the E90 error itself, and by this point, we could have purchased a real hot tub. Please do yourself a favor and SKIP this listing. Find something else.