This is my third Levoit product and the largest purifier I own. I use it after I cook, and it does a good job at dissipating strong smells like garlic and onions. My favorite use for it is setting it near my cat's litter box - medium speed  on the fan and there's no pet odor. I leave it on sleep mode at night so it quietly purifies the living room air. I like seeing the different air indicators cycle through so I know the purifier's working. The design is inobtrusive in my house and I like the convenience of the app so I can run the Core 400 on a schedule.