Sharper Image (S1697GRY) Air Purifier

This air purifier is ok. I think it may be working but when I go to clean it there is not much stuck to it and what is on there I have to be carefull because it falls off before I can wipe it. The entire outside of this machine collects dirt and dust just as much as the collection grid which is very ugly and doesn't clean off the pourous outside. For the most part it is quiet but every once in a while it acts up and makes a rattling sound. In the future I think I will go with a purifier that has a disposable filter.