All of the good things about the 45i apply to a greater extent in the 75i. We received it quickly and set up was easy. We placed it in our dining room / kitchen / living room area and it works very well. We live near a freeway and an airport so particulate pollution was a concern. We also have two cats. The 75i helps a lot in keeping dust and other particles down and our furniture and dark wood floors clean. I highly recommend this product and will be buying another for an isolated area of our home.