This is a very small, but effective, misting humidifier. It is mostly good, but I do have a couple of observations after using it for part of a day and overnight. First, it is impossible to totally fill the already small tank. Even if you add water to the point where it starts to overflow as you fill it when you turn it over and put it on the base, a significant portion of the water goes into the base so that the tank is about 3/4 of the way full before you even turn it on. Second, you absolutely have to use the cap, otherwise, it just shoots a cloud straight up into the air that then comes back down and gets whatever you have it sitting on wet. The cap allows you to control the direction the mist goes and makes it finer so it is not just a huge cloud of water. Third, if you dial it up to full power, which is pretty much required if you have a large room (especially if you also have vaulted ceilings) it will not run an entire night. I turned it on at about 8:30 PM and it was shut off before I woke up in the morning. Finally, it will shut off even when there is a bit of water left in the tank and there will be water in the base when you take the tank off. Just be aware of that because if you lift the tank without being careful you will get water on the table or shelf you have this on.
Ultimately, I do think that this is a good deal, but, for $30 it would be nice if the tank was a little bit bigger so that it could run longer. I do like the auto shut-off feature when the water gets low so you are not running the motor when it is not doing anything, which should allow it to last longer. That said, the big plus is that it does not require a filter, so you do not have to keep paying to use it after you buy it. And, you do not have to take it apart and risk breaking it in order to clean the parts that need to be cleaned from time to time. So overall, it is a good deal.
