Agree with many of the other posters -- it is extremely hard to fill this. You must fill it in the tub and with no handle, the tank can slip out of your hands easily. Once the fiberglass tank breaks, you're done. Also, you must run it with a fan behind it to actually circulate the mist around the room. The fan it comes with isn't powerful enough to do so, so it soaks the area around the humidifier. I've owned many humidifiers in the past and have never had one do this. The filter-free operation is great and it is incredibly quiet. Unfortunately, I don't see those two pluses outweighing its minuses.