Instruct: Classify a given Amazon review as either positive or negative.
Query: Great Product (Filter & Unit)

These seem to be one of the better prices around. We have been unable to find these filters locally (big-box and local hardware stores).The 3rd party filters are cheaper, but do not fit as well or last as long. We have three cats (indoor) and a large dog,. People do not know we have animals until they see/hear them (don't live in a McMansion).I also have allergies / asthma and the unit has helped a ton. Barely use my inhaler at home.