[This review was collected as part of a promotion.] I love the idea of a humidifier, especially in the cold winters in the Midwest. I was so excited to try this, and at first, I was pleasantly surprised. It is sleek, quiet, and effectively added much needed moisture to my bedroom. I noticed an immediate improvement in my breathing. However, I find it difficult to maintain, even when following the instructions for cleaning. Even after using vinegar, eventually, it developed a smell i couldn't get rid of, and I stopped using it.