Purchased for my son and I love how fresh and clean the air smells during and after use. Cleans out smells and smoke wonderfully. Less problems with breathing, sneezing, etc. I purchased the smaller unit for my son bedroom which is a fairly good size and it is quiet, and I like how easy it is to change filter and n clean up. Working great after 3 1/2. Looking to purchase bigger unit for home. This wood make a great house warming gift. Must have for your house. Will purchase again, multiples. Love the esthetics.