So glad i purchased this, and definitely recommend. At first I seriously thought I was experiencing the placebo effect - was skeptical that this could make such a difference after one night in my ~500 square-foot bedroom (open suite w/ bath, walk-in closet, and 10-foot ceiling). Over one week later, I am sure - I've not been using any allergy relief medication and I still allow the cat in the room. I keep the bedroom door slightly ajar (rather than wide open) at all times, and the unit runs on low 24-7. 

I bought the white color to blend with the room's modern style - it is very attractive. Since I now notice a slight must scent when emerging from my bedroom (1800 sq-ft condo sits on crawl space in Indiana - mostly humid atmosphere), i'm now considering buying one of Alen's larger-capacity units for the rest of the condo.