I haven't flown in a few years, but when I used to live in Windsor, ON I used to fly in and out of DTW when I would visit family and friends in FL (gotta love the domestic rates!).
I don't know how much it's changed since 2002, but I remember that the parking situation wasn't great -- not enough spaces and it was expensive. There wasn't a cell phone waiting area but at the time you were still able to wait in the car by the baggage area -- just as long as you didn't leave your car. Although there was a couple times when I had to pick up someone and the curb was full so I had to drive around -- and it was confusing; I'd miss the left turn and have to take the long way around.
Sky cap service was usually pretty good and efficient, which was a plus -- I tend to over pack my suitcase so they're usually heavy.
I know they were building a new area that was almost complete the last time I was there, but obviously I can't comment. Thank goodness on the update though -- the place was old and ugly.