From everything I hear/see they make a great kit. Like anything it has its pros and cons... Do your research, there are dozens of threads on "STS vs. _____" all over the forum... do a search. Preference plays a big role too. I went with another manufacturer based on my preferences:
- I like the turbos as close to the manifolds as possible
- I do not like cats before my turbos
- I don't like my turbos visable from outside the car
- I dont need a kit that is CARB approved
Good luck, you can't really make a "bad" choice... just make sure you make the right one for
you.