Shipping was fast and set up was easy. It's very quiet when operating and has a nice background noise that is easy to sleep with. I've already noticed a significant decrease in dust on our dark wood floors and glass furniture. My allergies have also been under better control. We have two indoor cats, so keeping their fur off things has always taken a lot of effort. The 45i is in our bedroom, and seems to clear the air there very well. It's easy to use and I plan to buy another for the back part of our home.