Instruct: Classify a given review as either positive or negative.
Query: great no complaines

i ordered 3 of these. i have one in kitchen,one in living room, and one in hall way. they are great so far(had them couple of months) they are great that all i can say for them! (they take the stinkey smells from our kitchen when we cook.) our house( so far) stays smelling fresh with the freshzone. we use it on low setting(anything other than low it is loud)