I own an Oreck Air Filter, 4 old Ionic Breezes and even 4 new model Ionic Breezes... those were already running when I added the Molekule Air filter... within just a few hours you could tell a difference... also the 1st morning I woke up my nose was clear and not congested like normal. It is very noticeable, if you've ever owned a good air filter before, that this one is one of those situations of You Get What You Pay For. It is Awesome. I took advantage of the payment plan, they make getting a Molekule in your home very easy! I will be buying more for sure and getting rid of my old tech filters! If you have allergies of any kind, this filter will make your home much more enjoyable! - Jeremy in TX