Well organized expo with easy access and an excellent variety of vendors. I heard a lot of people complain about the race shirt that we received, but I was happy with it. It fit well and I happen to like the color & the logo. Start line was very well organized, good signage & amenities, plenty of portable toilets. The flat & fast course takes you through all of the best neighborhoods of Chicago; you cannot beat the spectators...they were everywhere cheering! The aid stations plentiful too and the volunteers knew what they were doing, also friendly. The organizers seemed to be generous with the porta-potties on the course too, and I was actually able to find one in the middle of the course that didn't have a line! The finisher's area moved along without stopping, despite the huge crowds. Medical tents & personnel were visible with easy access at the finish too. All in all a great experience for such a large race!