Review Content Does exactly what it says is does Great product. When combined with the charcoal filter it even eliminates cigarette smoke odor.I put the filters in when it arrived, turned it on, and it has been running ever since. 24/7 with no problems. Very satisfied. Great idea, bad execution... Purchased the unit to run 24/7, home has carpeting and a small short-haired dog, we suffer from allergic reactions to both, but we cant rip out the carpet and we are not looking to get rid of our dog! This unit is a great idea, THE ONLY CON that I see so far is that the fans are PUSHING the air through the filter rather than PULLING it, this is the first time Ive seen such a thing in a room air filter, this means 2 important things: 1, the CADR will be less because its easier to pull air through a filter (especially if its a bit dirty) rather than to push it, so the amount of air that gets cleaned is reduced because of this engineering quirk, and the 2nd thing is, the fans will become dirtier faster because the air that its moving is dirty air, if the fans were pulling the air through the filter, they would not need to be cleaned as often as the current setup, there isnt even a pre-filter option for the fans, I would like to see this reversed in a new model if possible. As far as relief from allergens, Beautiful design that really cleans! I read about this new unit in Consumers Report. It has the lowest electricity consumption of any air purifier, yet produces a very high CADR (cleaning) rate. I run air purifiers 24 hours a day, so an air purifier that works and doesnt cost me a fortune in electricity is important. This one does both.