I bought this because we had a water pipe leak in our home and walls and flooring had to be torn out. The smell was bad, it has been dusty and my allergies were on high alert.
After reading the instructions, which are simple to follow and setting it up I was first impressed ny how quiet it is. My other smaller air purifier in my bedroom is louder than this. 
After running it for 3 days my allergies tapered off and there was noticibly less odor. 
I leave it running most of the day on Auto setting and like that it will shut itself off or you can set a timer and forget it. 
I like the removable and cleanable filters as well. I would like to get another for our bedroom in the near future. 
Happy with my purchsse so far.