TRACS Air Purifiers are generally well-received by customers. The Tracs TM250 Air Purifier has a 3-stage filtration system with an H13 HEPA filter that lasts up to 5 years and is 99.99% efficient at 0.3 microns. It covers an area of 1,875 sq ft and is effective against smoke, odors, and pet dander. Customers have praised its effectiveness, with some noting that it helped with their allergies and improved the air quality in their homes. However, as with any product, it's always a good idea to do thorough research and read multiple reviews before making a purchase.