I bought this about a month ago and have around 1150 miles. Car drives smooth with little outside noise. Very quiet engine! Electric power steering seems to working well with no problems. The interior is nice, however a bit nicer door panels couldn't hurt. Sunroof is quiet and a pleasant option to have. Seating in the front is very comfortable. Driver's side lumbar support is a nice feature, however it doesn't really make a huge difference. Instrument gauges are cleanly arranged, and the stock stereo is very nice! I love the features, and the XM that came with it! I have the 16" tires (instead of the stock 15") and I think it gives it a cleaner beefier look. Gas mileage is best at 65 mph.
Remote start/keyless entry, XM radio, 16" tires, sunroof, cruise control, power locks/windows, overall look of the car, huge trunk space, split folding rear seats, driver's information center (best feature!), stereo w/iPod hookup (no more carrying CDs!!), 2 rear view mirror lights.
Make side impact airbags stock/mandatory on all models! A bit nicer interior door panels, interior door handles are too far forward (move back a tad), trunk opening could be larger, gas mileage good but a bit below what was stated by GM. High back end - caution when backing up.