Originally Posted by
SocietyFlyGirl
That's an ER4 plane and the GAArgoyles at DTW are going to make you at minimum gatecheck your rollaboard.

And last time I was through DTW, they were only allowing 1 carryon (not the standard 1 + 1 personal) even if your carryon would fit under the seat. We went out with heaps of overhead space but a million people waiting for their gatechecked luggage on the ramp. (OT, how many people and how much weight can those ramps hold?]
I don't use a rollaboard. I usually bring a mid-sized backpack and a duffel bag. So far have never had a problem at DTW even on AE.