I purchased this exact model a few months ago, and agree with all of the criticisms. One curious point, however, is that while I don't see any difference in the hygrometer readings even when I put the hygrometer right above the device, the water tank does empty quickly. It's not clear to me how much water the air in my apartment can hold, such that a few gallons doesn't change the humidity even by more than 1-2%.
I have the same model in a medium sized room, with the hygrometer on the other end of the room where it is open to the rest of the house and the second floor. About 3/4 of a tank yesterday bumped us from about 17% humidity to 22%, with a fire going in the fireplace.