This 3 in one air purifier shocked me by its size when it arrived. I thought it would be a lot smaller. It’s clean looking and doesn’t take up much floor space. It does have an odor that last about a week. I’m not sure what it is but it is a strong smell, almost smells like an over powered “new car” scented air freshener. The filter is a beast, I haven’t looked at the cost of a replacement but I’m sure it isn’t cheap. Overall this has a lot of features. I like how the controls come off the device so you can control it from across the room. I blew some smoke towards it and watched the air quality indicator go down showing that it does do something. Heat feature is nice, not sure how energy efficient it is compared to other electric heaters. I’m overall pleased with the product, I have noticed less dust floating around the room.