I put the Honeywell Insight™ HEPA Air Purifier - HPA5100B in the bedroom because at night I get a stuffy nose pretty much all year 'round. First thing I noticed was the setting options with pictures. My last air purifier didn't really tell you what each setting was for so this was a nice perk from Honeywell. It is relatively quiet and sounds like white noise. Sound level depends on the setting. While I have only had this about two weeks I have noticed I'm not waking up nearly as congested as I had been and that is allowing me to toss and turn much less. I have a couple of cats so I think I will try the pet filter next and see if things get even better. Overall a great product that is a welcome addition.