I dropped off my car two days ago and received it today. The issue with the emissions / engine warning light was some "corrosion" with the "wires around the gas tank". Didn't probe further than that as I was running late, but it is what it is... so, if your light comes on, definitely get it checked out sooner than later.
Also, when I dropped the car off they notified me that there was an M Performance exhaust in stock; as such, I had it installed. Sounds nice.