1. Fantastic
First, the exhaust. It's a slip on, and it goes on really easy, even if you make a few mistakes because you don't read instructions (like me, ha). Nice deep tone at idle, and it doesn't shatter your ear drums when you rev it a bit. Overall, it looks good, it sounds good, and it's a sturdy piece of hardware.
Now, on to STG. For me, i was torn on this because there weren't any clear pictures or part numbers, and the pipe for my model and year comes in two variations, with one being more aesthetically pleasing than the other. STG was very friendly and informed me that they'd return the one i bought immediately with no questions asked if it was the wrong one. I called them after the exhaust shipped, and they were nice enough to look for the shipping/invoice information and let me in on the part number. They were super helpful and I couldn't be happier with them.
Great product, even better company! Go for it!