I think the face of the concept says it all: I'm so sad to be here. Seriously: those headlights are so expressive, the car looks like it wants to kill itself (not that I blame it). The entire front end looks like they initially traced out the original Mustang, but not from a flat picture, but from the uneven grille of the original, leaving a very loose and irregular impression on the concept.
The interior is a better remake of the original. Thin, crappy steering wheel, sparse guages; only the swath of aluminum replaces the swath of crap plastic.
The taillights are no dream, either. Again, another bad impression of the original. As has been already said, more mid-80's Thunderbird than anything else. And if that's where Ford is going to locate the exhaust, they had better not use typical Ford plastics: that stuff will melt in the first 100 miles.
"I'm driving a big red bathtub" is what the side profile says. It's so fat and slab-sided it makes the 19" wheels look under-sized. They also appear to have the whole idea wrong: It's not the coupe from '64 to '70 that they should have reproduced, but the fastback. That had a sporting look. That was a looker. The regular Mustangs looked like 2-door sedans.
Most shameful of all, you can bet this "totally new Mustang" will be 95% the same from last year. That is, unchanged since 1966: live axle, oversprung suspension, dead helm, and a engine that's only fast on paper. It'll renew sales, that's for sure, but only in a nation full of automotive idiots could this car survive for so long.