I have one that I've had for nearly 20 years. And for anyone wanting a desk fan, their Zippi line is awesome. Their technology really does work the way they say it does. For the air purifier, we blew out a candle, and I was able to watch the smoke make a bee line towards the air purifier due to how it circulates the air in the room. I have a crossbeam in my living room, and when the air purifier is on high, I can actually feel the draft of the air coming across the ceiling and hitting the beam and directing downwards.