This is a very nice large air purifier. It has quite a few functions that make it convenient to use. It has a schedule setting where you can schedule it to turn on for a certain amount of time at a certain time of day that works for you. I have mine turn on late at night for an hour now that it has run off and on for the first few days to clean the air initially. It has an auto button where it turns on and off on its own schedule. A fan speed button which is nice because as you get to the higher levels it gets louder. The app is easy to set up and use and I like that it tells you how your air quality is inside your home and is also able to tell you the quality of the air outside your home if you input your location. It has two rollers on the back that are supposed to help in moving the unit but they are not big enough as you can barely tip it or it is too much of an angle for the rollers so I have to pick it up to move it and it is not a light machine and it is quite large so hard for me to move from one room to another or up a level.