I was so excited to get this Air Purifier! I have a newborn baby and having clean,  fresh air is very important to me. We live in the country down a gravel road and dust is always flying. I was shocked at all the different settings and options. With 4 cleaning levels, touch screen  led control panel, and being able to see the display from across the room, I couldn't ask for a better purifier. I have this in a 150ft room but rated up to 175ft. Superior quality and definitely worth buying.