Bought my 2014 GT in August of 2013. Currently has 10,500 miles on it. It is not a daily driver and is my fun car. The few mods I have are in my signature. What has been a problem is these things.

Radio screen delamination- Fought with Ford for four months before it was fixed.
Driver's side door panel was replaced due to the insert coming loose.
Bubbling paint on underside of trunk lid fixed.
Bubbling paint on underside of hood denied by Ford. Still not fixed.
I have some type of outside roaring noise that is either tire noise or possibly rear end/driveshaft noise. Dealer says tire noise but who knows. Not fixed.

But overall, it's been a reliable car that is fun to drive. The GT500 AB and OTA pipes make it even more pleasurable.

Wayne