I use the cover for out side storage for a 2008 GT.
The fit is snug and tight, the mirror pockets are very helpful. This cover stay in the car despite high winds.
The cover replace a generic Mustang cover(no mirror pockets - loose fit).
I am very pleased with the performance.
The previous cover had a nice soft pad that was the interface between the car and the cover. This cover did not have that pad. Not sure if it makes a difference. Intuitively you would think it would.
Rated it a four, let's see what happens over time