Great little air purifier! The best one I've had. Just the right size for my bedroom and fits nicely on my nightstand. It's easy to operate and set. I can definitely tell the difference in the air after I have used it, smells fresh. The feature I like the most is the timer. I don't like to leave it running all night, so I set it on 2 hours before I go to sleep. Works great! The filter is super easy to remove and clean, just vacuum off.