I've smelled a CS DP and mid-pipe combo, and I would not have been able to deal with the fumes... That maybe cause I'm getting old and I want comfort in my rides...back in my 20s, I would have cared less... (lol2)
I'm gonna need to check one out for myself. My buddy has a catless, wide open exhaust on his IS, and you can't smell anything at all in the car, even when sitting there at idle. When you get out, thats a whole 'nother story, but if its not bad in the car, then *shrug*.