So far this air purifier works great. I love the "auto" color function that reflects a change in air quality. Don't know the filter life cycle yet, but happy to know the unit will inform me automatically when it is time to change the filters. I enjoy the wide range of fan settings in manual mode. Overall, I am pleased with my purchase. This is the third Bissell product I have purchased over the past few months and have found that this company provides quality merchandise and excellent customer support.