Fantastic air purifier! We recently adopted a rescue kitten and I quickly learned that I have a severe pet allergy. My doctor recommended I invest in an air purifier, so I did a bunch of research and decided on a BreatheSmart 75i for the main level of our house based on the reviews I read. Within a week of turning it on, my allergy is nearly gone. This is a high quality, worry free air purifier that performs as advertised. Thank you Alen!