I purchased this tub last August, 9 months ago.  In the beginning it worked fine. At the beginning of the winter we noticed it would lose it’s heat quickly, after about 20 of the tub being opened.  By mid winter we could not even use it because the temperature of the water would drop from 104 degrees to 98 degrees within 10 min.  We tried setting the tub on top of 3” styrofoam insulation as a base and also only opening the tub halfway when we were in it, to keep the water warm enough to use but still wasn’t enough.  It is now May, the air is around 15 degrees Celsius every day, but the tub heater is still not working.  When I called Wayfair to complain, I was directed to call Dreamworks directly to inquire about the warranty, unfortunately I have not been able to talk to a real person there even after 3 days of calling.  I am very disappointed and dissatisfied with this product and do not recommend anyone wasting there money on it.