We bought the BreatheSmart45i for the living room area and the BreatheSmartFLEX for the master bedroom. Both are working as advertised. Little to no dust is found on our furniture. I turn it on every morning for 12 hours and it seems to be enough to keep the air clean. I only wish the timer could be programmed to turn on automatically at a set time daily instead of doing it manually. However, we're very happy with the product.