Bought it used in 2007. Steering wheel controls have started randomly switching themselves, radio went a few months ago, three separate parts of the AC system have also gone, rear wiper stopped working, passenger sliding door auto lock stopped working. Other than that, there have been no problems with the transmission or engine.
Power, handling (for a minivan), engine quality. Interior finish quality inside the 2004 is waaaay better than the 2008-2012 which is all cheap poorly fitting hard plastic.
Dampen road noise, fix the electrical problems. Better quality control.