I am impressed beyond description. Every feature is 5 stars I believe this is the first and only 5 star review I have given in my 10+ years of shopping at Amazon. I just started smoking a pipe and was looking for something to mask the tobacco smell. Well this does not mask the odor; there is none! My wife (who does not smoke) says she can not smell any tobacco at all. I smoke 5-9 bowls a day in my 20’x20′ office with a dual 12″ exhaust fan and the Smoke Odor Exterminator Candle Orange Lemon Splash 13 oz burning. It has exceeded every expectation!