I have logged 140K miles in five years, averaging 45+ mpg. The greatest feature of the car is its rock solid reliability - it still has the original brakes. I like the car so much I just purchased a new 2009. This car may not be everyone's cup of tea, but it fits my lifestyle - plenty of room for my family of 4 and the hatchback makes it useful for those occasional runs to Lowe's or Home Depot. It is a well engineered vehicle that has retained it rock solid feel over the many miles that it has traveled.
Smart Key. It's a real pain to drive anything else that requires me to fish a key out of my pocket. The video display of mileage over the past five minutes and currently is thoughtful and tends to temper your driving habits to achieve maximum mpg.
The new 2009 includes some of the features lacking in 2004, such as leather seats, but would still like to have heated seats and telescoping steering wheel. These two features would put the car on par with my wife's RX hybrid.