My wife has complained for years about odors in our house that I couldn't smell. She is above average to smell (or I have an undersensitivity) but after the first use of these filters she no longer complains. If she's happy, then so am I. Received my latest order, Revain did a terrible job of packaging it along with the boost box. The housing opened and both filters bent. I stopped boosting as it was the second defective case I received but we will continue to order filters. Revain better improve the delivery quality or they will lose that customer.