Fantastic! I have purchased three of these in the last few years. One for my home, one for my vacation home and one for my brother. They are absolutely reliable and very efficient. The great thing about these is how easy they are to move. I am able to move mine by myself when necessary. The only problems I've ever had with one is the lights occasionally need replacing and the replacement covers(they last about 4 years) are kind of expensive(usually around $200). I would recommend these to anyone who uses a spa frequently.