We bought this car four years ago and it has been nothing but reliable for us. Starts easily even in bitter cold. We haven't had to do anything other than routine maintenance to this car. Smooth ride. Roomy backseat - three kids can fit easily (two with carseats). Nice trunk space. Ride has gotten a bit noisier through the years, but is not unacceptable for a ten year old car. We have about 170K on this right now and will keep it for as long as it will go. Our Camry had 250k on it when we finally sold that (was still running and in great condition), so we have high hopes for the Avalon.
The "power" button when extra power is needed in acceleration, the sun/moonroof.