Inflatable spa hot tub shipped fast, very easy to assemble, inflate and hook up the pump to the spa. Filling the tub to the clearly labeled maximum water lines takes 20-30 minutes. The heater works great, and we noticed that after filling it takes approximately 8-10 hours to reach maximum temperature with the cover on and in an enclosed space. The pump does make more of a rattling noise, but I am working this out with warranty department as I do believe it was a factory defect. Comfortably fits 2 adults could do 4 but it would be a bit tight. Filter cartridges are good quality and can be cleaned off a few times to prolong their use. Lid is a soft top lid with buckle straps that you can adjust to make the cover tight to hold in the temp. over all good product.