Congratulations! They say there’s two halves, you know - the first one is 20 miles and the second is 6.2. I’ll be perfectly happy with 5:33 this time next year, I assure you. 
My running buddy is from Detroit and has run both Chicago and Detroit several times. At least twice he ran Chicago and Detroit in the same year (they are 1 or 2 weeks apart).
He said Detroit is a really nice course. And it is nice that it isn’t as crowded as Chicago. But in addition to fewer runners there are many fewer spectators, and he said it got a little lonely at times running around the island that is part of the course.
Do they still end up right in the stadium? Used to make for a cool finish line photo op.