The Shark Air Purifier 3-in-1 is easy to set up and the controls are easy to understand.  The remote control is a very nice feature and operates smoothly.  In the lower fan positions it operates almost silently which I like since I have it in my bedroom.  The purified air works on all 3 options, heat,  fan and air.  I love the automatic feature because you just set it and the machine does everything on its own.  This is a solid air purifier and great for a large room.  They recommended setting up the air purifier to at least 3 feet from the wall so keep that in mind if you have limited space.