This is our third spa by this manufacturer, although their company name changed.  We love that it is plug and play, but wish the seating were just a tad bit deeper.  Water level comes to nipple line for most average sized individuals.  The set up is extremely simple, although the spa does take about 2 days to reach full temp.  Once there it has been cycling on the two auto filter settings in the morning and evening and holding temp.  There was little feedback on how well it maintains temps in a more northern region, and since this is our first spa of this kind up in Indiana, we have a level of concern, but figure we will deal with that if we have to come winter.