A further note: The original review I wrote was in February of 2019. After two winters of excellent results, my humidifier stopped producing vapor when I went to fire it up again this fall. I contacted the Pure Enrichment company, and they back their product. They could have asked me to return it, but they didn't. They are sending me a new one, and I am beyond delighted.My original review was four stars because I didn't know how durable the product would be. Given the excellent customer service and follow-through, I've changed my review to five stars.Here's what I said originally:_____________________________________________________________________________________________January air is horrible, and by February my sinuses were clogged with dried up crap I couldn't remove without a very disgusting nosebleed occurring. I did a quick Google search and learned that I need a humidifier in the bedroom at night. I found this one on a lightning deal for ten dollars off, and it works. I am terrible with assembling things, but I thought I should at least try to put it together myself before I asked anybody to help me with it. I looked at the little brochure, looked at the humidifier...seriously? That's it? Two parts plus a little disc that goes in the top of the neck to let me guide the steam in my direction. Couldn't believe it. Done.There is a downside that applies to every single humidifier, not just this one: if you have asthma, there will be a problem. My asthma is mild and isn't irritated by having this thing in the room, but when I tried standing over it to inhale the steam faster for quicker relief, my lungs started whistling and I had to back off. But during fire season, I am delighted to have it, because the outside air gets in, no matter how much we try to seal it off. It's important to know that you have to clean it. It's not complicated, just vinegar water will do it (top chamber only), but if you let it sit over the summer and don't clean it up, you will have way more problems when you use it again than you would if you didn't have it at all.There's a nightlight feature that makes the upper half glow blue in the night. You can turn the nightlight off, and when we go to bed we do because it's more light in the room than we want, but it's surprisingly pretty. When the nightlight is off, the little button that tells you if it's off or on still glows. When you start to run out of water, the button starts to blink red. If you sleep through it, it will shut itself off when there's no more water at all.The only problem is that it's very cumbersome to refill. The base usually still has about an inch of water standing in it once the top chamber is empty, and so when you pick it up, it drips all over the place. I have taken to keeping a towel nearby, and I don't even try to pick it up until I have the towel in one hand, ready to slide under the top chamber when I remove it. To refill, the unit is said to fit in most standard sinks, and it goes just fine in ours. You need two hands, one to keep it from falling over and one to turn the faucet. Then close it tightly, turn it right side up to get rid of most of the water that's accumulated outside while you were filling it (this seems unavoidable), and slap that same towel over it when you are ready to step away from the sink. Another quick change from the towel to the base; now it's ready to turn on. They say not to leave standing water in it for long, but sometimes I leave water in there for a few hours and it doesn't appear to create mold or other health problems.Ox, the oversized beagle pup, believed it was a steam-breathing monster and barked at it for two days.I have used it for about a month, so I cannot speak to long term durability. Right now I'll tell you, I'd buy it again for what I paid for it in a heartbeat.