This was a semi-researched but spur of the moment purchase for me, so I was not sure how happy I would end up being. I wanted an ultrasonic humidifer because it lessens the concerns of mold, bacteria or other germs being spread into the air while running. This model is pretty easy to set up. You unpack, insert the filter, plug it in the fill the reservoir and turn it on. Beyond a quick wipe inside the base and an occasional santizing rise for the reservoir ever week or so there isn't much to worry about. On low, the water will last on average 2 to 3 days. On high about a day and a half. Because there is no fan this unit is pretty quiet, and produces on a very low level of white noise. There are really only a few downsides to this machine that I have found. The main one is that the filters are generally hard to find. If you have hard water this will be a big problem because one your filter is full it will start spraying up a small amount of mineral deposits. In my experience you will need about a filter a year (and I have very hard water) and depending on where you and your supplier these can be near impossible to find. The second year I used this I was able to pick up another filter in the store but have never seen them since. Because this is a cool unit, you do need to be careful about drafts. I found out the hard way that I had placed mine in a cool draft you couldn't feel and my machine was running in a very very large pool of water - so make sure you are in fact running this in a warm spot of your room.