Driven Mustangs a few time as rental cars in the US... nice to have for a few days in a country with big wide roads and cheap petrol... Don't think it would be practical here for those reasons and the novelty will wear off very quickly as actually not that great a car... and nothing like a Scooby for pure driving pleasure (or a Z3 M Coupe which I loved or Exige maybe).
According to Clarkson, they do about 20mpg, not much worse than a subaru apparently they have a small fuel tank doh and only do about 250 miles to a tank or there abouts,