Yeah. I checked that seller feedback and it wasn't so good. But I literally found the same exhaust from a different seller for the same price. And he has a much higher positive rating.
As far as the sound, yeah, I figured it sound much more ricey but it will def be an improvement over the stock exhaust. And believe me, if it way too loud I will take it off. $150 is a good price and for the minimal HP gain I'd get from it should be alright until I can get a nicer exhaust.
btw, I seriously need to post a picture of my ZTS for my avatar. js