I bought both, the Pure Air -Ultrasound and the humidifier Wick-610E. The Pure Air has its advantages: nice, compact, easy-to-use water tank, buzzing about as loud as a quiet fan it is not loud but clearly audible, it does not have as much to clean. Disadvantage he clouded the water and needs only in my 25 square meter room almost 3 hours to about 45 to 55 percent moisture come. The humidifier Wick-610E has the advantage that it barely needs more than an hour for the same performance. I then make him an hour before bedtime. He is a little louder, he gurgles like a pressure cooker on a hot plate and actually has the same functionality. Disadvantages: the water tank is cumbersome and clunky at the sink and the device is after 2 weeks use of one hour a day so calcified that you have to take it apart again and the Teflon ground again soak with vinegar and must be cleaned. I believe in the guidance is: weekly clean. I mean that children can not scald, the container is only Luke warm. Only the flow of steam coming up out is very hot but just right at the opening. I tried it, it shrugs his hand then quickly away again because it is a too hot.