I like the sound of the exhaust, not too much, not too little. Just a little deeper, throatier sound which increases as you accelerate. It doesn't bother me or my passengers when at highway speed. If you want everyone to know you're coming, it may not be the best for you.
As for a performance increase, I wouldn't say that it's particularly noticable but then I also have a Conforti CAI and shark injector, which will have a much greater performance impact.
Hope that helps.