I am glad I tried the Instant air purifier. It has great features and works really well. 

It is quiet, even at top speed the fan is not overly noisy. It is easy to program it for my needs. The auto feature is great. If I want it to run a little extra it's easy to just push a button and it starts right up. The light is an attractive design element and has controls to make it go dark at night so it doesn't disturb sleep. I love that it has a sensor that measures the air quality so you know how well the purifier is working or if you need to turn it up. I really like the fresh, clean feeling in my home since using this air purifier.