I have had this product for several months now and it has really proven itself. Its cleaning and ionization features really have helped to make it easlier and more comfortable to breathe in my bachelor pad. Also the humidifier feature is fantastic. In fact, I have even cooked hamburgers on 3 seperate occations in the last month, causing the air to become smoky even with the kitchen range hood fan running at full speed. But in all cases, this unit automatically detected that the air quality was bad and then kicked into "high gear"--all within just 2 minutes after the smoke started billowing. It then cleared out all the smoke in less than 30 minutes, making the air all new and fresh again! This is definately the best product for small- or medium-sized apartments--especially for people that have certain breathing problems.