Cost more than most but a good unit, except for the water tank design. Must turn tank upside down to fill. The tank is about 18 inches tall and has a large capacity (3 gallons), and it has a POINTED TOP. So to fill it, you turn it upside down and hold it steady in a bathtub... there is no real easy way to do this. I was filling it up in a wet bathtup and (no surprise) the pointed tip slipped on the bottom of the tub... the tank fell over and then cracked. Very sad to see such a fatal/poor design in an otherwise nice unit.