I was immediately impressed with how ready it was to set up this air purifier. It is basically ready to go out of the box - you just have to unwrap and insert the filter, and plug in. I also like the size; it's pretty small and looks sleek! It also runs really quietly, making it unobstrusive. I have 2 minor complaints. First, I can't tell any difference between using the various modes. Secondly, I wish it had a timer or automation feature, instead of running constantly. Overall I think this product works well. It's currently keeping my living room fresh and helping to minimize pet odor.