What can I say - I bought a 2005 because I needed a car (my '92 Lumina Van croaked at 218000 miles). There was nothing wrong with the '05 but GMAC wanted to get rid of their leases and they made me a good deal! The '09 feels like it has a little more power and is a bit more solid overall than the '05. Never had a problem with either car.
looks, basic performance, appointments, enjoyment, and reliability (did I say looks?)
Nit picking - mileage seems a little bit less than the '05 (down maybe 4 mpg). The trunk could use a bigger opening.