I did. Took a 06 GT for a nice ride.
Interior is good. Seats could be a bit more sporty. Felt kinda old fashion but thats kinda the idea. Interior was light years ahead of the old mustangs and about on par with a 350Z which isn't saying much but isn't horrible. I liked the steering wheel and the feel of the shifter. Back seat was useless as expected. The engine sounds great at idle and just gets better from there. Pulling and taking the car through the rev range was nice. The car felt fairly large. Cruising on the highway was nice because the engine note kinda disappears to a slight rumble. (not annoying like the GTO) On the back roads the car was fun but not as tight as I had hoped. It drove comfortably but the low seating position, long hood and large size conspired to make the car feel unathletic. The suspension was more loose then I had hoped but the brakes were good. Steering was boring. It def would make a fun daily driver because of the reasonable exhaust tuning. The solid rear axle didn't make itself known until broken pavement... the back end got kinda loose and wiggly. It felt fast but not that much faster then my Legacy GT...on backroads I think my LGT would keep up.
Overall its a nice vehicle... great for a mustang but still a class behind in dynamics from the 350Z, RX8 etc but a class ahead in power and sound.