We bought this unit in November 2010 for our 14x16 bedroom, because of the lack of humidity. The 5 gallon reservoir allowed for setting the humidity without the need more than 4-5 refills a week during the driest part of the season. Convenient, easy to refill, and I only needed to use 2 wicks-filters for the season. I would have given the product 5 starts, but the humidity sensitivity system is just a tad too course in my opinion. Overall, it worked exactly as advertised and worked extremely well!