I just moved my terminally ill mother into an apartment with me so I can care for her and she refuses to quit smoking even though it's killing her. So I purchased two of these.  One for her room (the only room I allow smoking in) and one for the rest of the apartment to try to catch the smoke that escapes from her room.  Obviously the only thing that will completely eliminate the smoke smell is to not smoke, but these guys are doing a bang up job keeping things tolerable anyway.  They are sleek, fairly quiet and are totally worth the price.