Depends on if you want to buy replacement filters or not. I have a smaller version of the ionic breeze,about a foot high, and tho it doesnt move air like a fan does, it does move enough air to make the dirt stick to its filter rods. its amazing how much it picks up. I live in a dusty state, so I have to clean them once a week or so, but thats all dirt I am not breathing. It does create ozone, tho, which some say is not good for you, so I turn mine off at night when I am in the room. But it keeps the room smelling fresh while it is working. I have also tried several filter type cleaners, also, but I dont like haveing to buy the expensive hepa filters, and while they do filter the air pretty well, it gets to be a pain, because the store may discontinue them after a while, and I have to search for some other place to get them, etc. The ionic breeze never needs a filter, tho, I just wipe it down with a couple of handi wipes once a week, and thats it. I bought mine at a thrift store for 5 bucks, tho... so Thats quite a discount from the Sharper Image price.