yeah got the Exmag. I love it, it is really good exhaust, looks real clean. You gotta love the black finish and chrome tip. yeah it is real quite, but really changes tone when you get on it.
One thing you should know thought only the muffler is stainless steel and even then the welds there are raw steel. A lot of people think it is an entirely stainless exhaust. Despite that I had mine for a year in pittsburgh and it showed hardly any rust. I have heard rumors of people having them rust from the inside out, but that will happen to any exhaust if drive a lot of short trips (<5 min.)
It has a pretty good finish on it, keeps it from rusting. When you first push the car with it you will smell the coating burning a little. But it probably supposed to do that, maybe it cures it. At any rate it the finish looked the same after a year as when it went on, just some minimal rust on the welds.