I'd definitely pass on it. If cigarette smoke bothers you at all, no matter what you do to it you will always smell it. I've tried the ozone treatment but it doesn't work. You may think you have all the odors removed until you have the rv closed for a few days and as soon as you open the doors it'll be there again. Besides, not only is the odor unpleasant but the enviroment is unhealthy. I'm sure some people will say it doesn't bother them and they don't smell it and that's due each individuals sensitivity to cigarette smoke and smells.