Although it is the third year (winter only) after purchase, as impressions used, humidification power is enough. Easy water supply once a day (weak driving 12h - 16h). However, frequently (if you use it every day, at least once a week) it is difficult to take this because it will crystallize on the evaporating dish unless you clean it internally. Even when cleaning the interior, it is very inconvenient and exhausting because it is necessary to wash a very heavy body entirely, such as in a bathroom. Since the inside of the periphery other than the evaporating dish also becomes dirty with a light brown color, it is rubbed with a soft brush or the like, but some parts can not be cleaned well by the structure. I wish I could disassemble a little more. Also, with daily water supply, the upper lid when removing the tank and a lot of water droplets are attached to the tank itself, and when water is supplied, the pots and water drips to the floor. Although the tank is also a poly container, it is pretty dangerous because the sharp edge is pretty well formed. Although improvement points are many, I think that it is excellent with cost and humidification power.
I use the water tank for about 10 to 12 hours for a whole day with full tank, but it is easy to finish with water once a day. I think that it may be better to have more humidification power because it uses a large heating for rebar building. Cleaning is easy.