Review Content Not so good for Nevada Good little machine, but not so good for the desert. Be prepared to refill once a day. Pros and Cons The first one of these that I received had a faulty control panel. I can say that this unit really does help. And I have had good and bad purifier purchases, so I know the difference. Be aware if placing this purifier on top of something that it will need an exceptionally strong piece of furniture to hold it. My game plan has been to alternate one of these with a HEPA and carbon based purifier (that moves air faster) in every other room. I had two purifiers total when I purchased these and now have 5--2 of them this SGBlue model. Eventually I will get a 6th of some sort. That will cover most of the rooms. Be aware in purchasing air purifiers that even if they claim ability to purify wide areas, that will only be feasible with an extremely open floor plan and is still not recommended. Most houses do well with one small area purifier per room. What I did not anticipate was how these machines would alter the humidity of the home significantly. The home is not "humid" per se, but it is definitely no l Great office air broom I use this filter in my office at home (only place on earth I can smoke anymore) and it serves its purpose to sweep away smoke odors in timely fashion. Cool Thing! Really cool and unique design, requiring no expensive filters to constantly buy. Its a new technology and might take a while to catch on, but when it does... watch out HEPA monopoly! I think I got the last one as Sharper Image has sold out and wont be restocking, but I believe it is available directly from the company at sgblue.com.