This little spa has been a great addition to my patio deck.  I bought it in Sept 2014, it has been running at 104º ever since with 110 plug. No problems at all and lots of fun.  It's small, ideal for 2 or 3 adults, 4 is a bit tight but ok.  It doesn't take a lot of space. The jets are a bit weak but it's a small and inexpensive hot tub. I'm cleaning the filter every other week, and a general cleaning with water replacement every 4 months. Usage 2/3 times a week. I live in Oakland CA.  Maintenance is low. Highly recommended.