This is my 3rd purifier, so it’s safe to say that I love it. The machine is easy to use right out of the box. It covers a large area and is extremely receptive to anything in the air that shouldn’t be. The heating element works great and is a life saver in the winter. It has a thermostat which is awesome. Filter changes are easy and quick. Overall I’m happy with my Shark 3 in 1 Purifier, well, all 3 of them.