Best Air Purifier Ever! I have purchased 2 of these... It's worth the cost of the unit, great for odors like pets. I have a cat and totally solves the litter box issue. It is good for cooking (if you cook fish, or burn food and you want to get rid-off the smell), it is great for the kitchen/living area. NO MORE "HOMEY" odors. I use it on a day to day basis, breath clean fresh air all the time… I recommended it to anybody that wants to breathe clean fresh air inside every day. I didn't buy it for my allergies but, had mild allergies before and now they are gone. Definitely worth the price!!