5/10, because an understated Mustang is like an understated riot... Illogical. The guy second from the right appears to agree. Removing the fact that it's a Mustang, minus the lack of grill between the headlights it looks alright, which brings it back to 5.
It looks like a big guy who unintentionally towers over you and you feel like any moment he's going to drool on you, and pat you on the head.