Having put 9K on the car, here is what Ive come away with so far: The 6 cyl is solid and steady, but feels lethargic at times. The engine response is reminiscent of a pickup truck, and even the manual tranny does little to remedy this. Doing 80 on the freeway in a straight line, the car feels planted to the pavement, but if you hit any sort of uneven surface while turning above 30 mph, the experience is unsettling for both the car and driver. If the pavement is anything but bone dry, the Stang needs skill and a steady hand. With the V8 and the suspension you get, the GT is certainly worth the extra few K.
Styling - both outside and on the interior, which i feel is superior to both the Camaro and the Challenger. Old school feel and heft of an American car. Great feel of the manual transmission.
Poor storage space availability. The placement of the cup holders is strange to say the least. The center control panel(radio/climate) can use a re- design as well. Suspension is much too loose for a sports car. Seats are a bit odd as well.. head rest and side bolstering get uncomfortable on trips.