Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Clean Air for a Great Price!

First I'd like to say that in the past I always purchased Air Purifiers with those replacement filters that can be very costly. Never again! I now own 4 of these filterless Ionic Pro Purifiers and couldn't be happier with the clean, fresh smell that they leave in my home. I have 2 cats (and 2 litter boxes) and a dog along with periodic visitors who smoke. You would never know it if you came to my house. I'm waiting on 2 more to arrive and then I'll have one in every room.Don't hesitate to buy this product. It is well worth the money!!