The pros first. This is a great size for the bedroom. There are many different operating options that should please everyone. The unit is easy to fill. Depending on the flow of the mist you choose, it is quiet. When the water runs out, unit shuts off automatically. Now the cons. When the water goes from the reservoir to the bottom, it makes a gulping sound. This happens about every 30-40 minutes and it woke me up the first few nights. When the water gets very low, it starts making more gulping, clicking sounds, almost constantly. I had to get up and shut if off this morning. If you are a heavy sleeper, this may be for you. If not, then be prepared for some noise.