I like it, but much prefer the air400. I wanted a smaller purifier for my bedroom,I"d been pushing the Air400 back & forth. However this one makes an annoying humming sound on low. If I turn it up the fan it will cover it, but then it's just over all noisier, but the sound of the fan is preferable to the sound of the hum. Bissell was great when I asked about returning it, which I'm still on the fence about. And they've been great with any questions I'v had with my original purchase, the Air400. I'm in CA, & have relatives & family in OR, I have recommended the Air400 to numerous people as well as online chats. Both states are struggling with horrible air & more & more people are looking for help.