I'm a smoker, but my partner quite a while ago and I live in an apartment - where people were complaining about the smoke!! I bought this little purifier (about the size of a small oval trash you might have in your bathroom), and I put it on my side table. The Purifier sucked in the smokes and clean the air really well. Since I purchased this neither my partner, nor my neighbours have complained about my smoking! The clean air coming out of the top is quite impressive, and provides a strong air flow.
On Highest speed fan its loud. So I just run it on highest mode when I'm not home, but when I'm here, speed 2 is barely noticeable and Speed 1 is perfect for night.