I think that this air purifier is a great product. I am using it in my bedroom and I could tell the difference on the air quality.
Just like any fan it makes a little noise. It is not silent, but I found the fan noise to be fairly quiet. There are several fan speeds, but I keep it on the lowest speed and doesn’t bother me at all.
Only time will tell about its longevity but according to the manufacturer it’s got a lifetime warranty.