Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Works great, priced reasonably, and easy to maintain

This product is great...takes so much of the bad dust and dander out of the air and has helped our breathing tremendously. We have several large dogs in the house, and this product eliminates the odors and dander they inevitably put out. And all you have to do is periodically vacuum the dust filter and it is good to go again. You will be amazed at how much dust these will pull out of the air in your home.