I did a lot of research on that and as long as you do your maintanence you should be fine. All the guys I talked to said that they were more than reliable.
Plus the looks I am getting in the Bullitt outnumber the G like crazy haha I am loving it so far.

 

Congrats on the purchase though! I still think about getting a s197 every once in a while. Looking to pick up a G soon, only concern is that the G will most likely be better in the snow as opposed to the mustang. Fuel economy is about the same, and blah blah blah.

Enjoy it! Check out mustangforums.com