The 2011 model Mustang is a very tight ride with a quick engine and transmission. I have the upgraded 3.31 rear end which took about 1100 miles to break in. I will forewarn anyone to be extra careful during this break-in period as the car will thrust forward after a slight delay from the gas pedal. I have the pony package and premium model. The SYNC voice activated system is without question my biggest surprise and I highly recommend this option. I'm still learning the intricacies of it but the hands off phone is awesome. Look these cars over and you might decide to order one the way you want it.
SYNC system, Ambient lighting including the Mustang name on the door sill and the dashboard gauges. I have 4 gigs of music at my command using the USB port. It's the fastest 6 cyl car I've ever driven.
Holder for sunglasses and more storage space. These are minor compared to the pros.