First of all it says on the box and instruction manual that it can operate with tap water. Well, it did not. Second of all, when I called Groupon about it, they didnt credit me with anything, now I have to buy purified drinking water to keep my room dehumidified as I have asthma/allergies, reason why I bought it. Third, there was already a crack in the internal plastic where you pour the water in. Not happy with this purchase. I want to return it. and be refunded.
It is simple and straight forward to use, however, turning off the LED light was iffy/tricky. It did not respond to simply touching the button per the instruction. Other than that it works very well and is a keeper.
This is perfect to add moisture to our bedroom. I went with the bigger size to last longer between refills. It is on the bigger size, but still fits nicely on a nightstand. We have slept better the past three night with it. Totally worth the purchase! We even traveled with it one night and plan to take it with us on future trips.