Already a fan of Levoit filters I have several core 300 filters with the VOC filters to remove wood smoke from neighbours that burn daily in winter. They definitely work (I’ve measured air quality). I’m an asthmatic but the filters help considerably and are the only things keeping me sane throughout the colder months. I bought the smart version to avoid running up/ downstairs to turn the filter on/off in the bedroom. This filter has the simplicity of the original with the extra handy features like remote control, timer with more options, sensor, scheduling. Just the right balance - does everything you need it to without being unnecessarily over complicated. If I had one tiny criticism, it’s that the white case does eventually turn a bit yellow over time. But that’s really nit picking because the functionality is great.