Product review (5 stars): Very much worth buying!
I own one and am looking to buy another because I like it very much and need another for the other bedroom. It (like all humidifiers gets dirty after awhile), but is not difficult to clean. All you need to do is soak the part that dispenses the mist in a bleach water mixture for a few hours and then rinse. Nothing else! There are three screws to undo, but they do not require a screwdriver. You can unscrew them by hand very easily! Then you can soak the main two components that get dirty/moldy: the base and the main dispensing unit.  I would say they need to be cleaned about once every other month. And even though isn't perfectly quiet, I would not say or call it overly "loud" either. It emits a soothing 'humm' that is very reasonable. Overall, it's very much worth buying!