This thing is like a little R2-D2 in my house.  It lights up blue when the air quality is good (which it is in my house and I am surprised by that). It has a touch button system that lights up and activates. All of the features work. It is relatively quiet, not silent, and it can be heard in relation to a television, but it's totally worth it.  I feel healthier just knowing this is in the house doing it's job.