Its a great product and a major improvement over the earlier model that I was using. the auto mode and sleep mode functions are good, however the best feature is resuming after a power failure. Our locality has frequent power cuts and line tripping incidents. the older air purifiers switch off when the power goes and have to be switched on and set again.
This model is different than it starts by itself with the original setting that was there before the power failure. the three-layer filtering ( pre-filter, carbon filter and HEPA filter) is particularly useful in removing the larger dust particles and lint something that’s more common in my area ( construction sites in the vicinity) . I recommend this unit to anyone looking for an air quality appliance for their home, its economical, easy to use and maintain.