After purchasing my first BreatheSmart several years ago for my basement, I loved it so much that I added a second for the main floor of my home. Then followed the FIT50 for the upstairs and most recently the Flex for the master bedroom. 

The customer service was wonderful to work with when one of my units was not working correctly. They replaced it immediately without hassle and I have had no trouble with the unit since. 

I think the fact that I continue to add units to my home over the years speaks to how well I feel these purifiers have improved the air quality of my home. 

They run quiet and the silver filter is perfect for my pet friendly home. I have and will continue to recommend the Alen Air Purifiers to my friends and family.