I've been using these filters since 2014 and have been very pleased with their performance. It's very convenient to have a 90 day cycle per filter. I'm always amazed by what is found in them when they are replaced! I treat these filters as a whole home air cleaner which also saves $ from purchasing physical air cleaners in each room. I will be purchasing these filters as needed in the future!

 PS. there is no air loss with them either as they will keep your A-coil clean which is the main cause for air flow reduction. [This review was collected as part of a promotion.]