To summarize, while this is a high-end HEPA air purifier and does cost a bit more than some models you may have previously considered, it may be well worth it. Not only do quality proven products tend to last longer and work better throughout their lifetime than cheaper products, the health benefits offered by the efficiency of an air purifier like this one may be well worth the extra cost. Used by hospitals around the world, I would say this purifier passes my "good enough for my family" test!