I have created a running website named www.askrunguy.com based on having run over 100 half marathons, including all fifty US states and several other countries; and several full marathons, with a goal of running all six World Major marathons. Below is a template for comments for my rating each race:

Race: Chicago Marathon 2017
Race Type / Terrain (road, trail): road throughout downtown Chicago
Organization (Expo, volunteers, start / finish): Excellent. Very well organized, and very worthy of a world major marathon. Great expo and great volunteers. Plenty of aid stations.
Support (fans, music on course): Course allows for fans to see runners at multiple locations. Super crowd support, bands on course, etc
Course Scenery: Nice scenery of many neighborhoods throughout Chicago
Course Difficulty: quite easy. Very flat and fast course, but several turns.
Weather / Temperature: in 2017 weather was pretty warm. Started at about 60 degrees, rising to mid-70s F by finish. Lots of sun. Little shade for last 20 miles.
Course location recreation (sights, things to do): There are so many historical and cultural things to do and see around Chicago. Great food and drink places too.
Logistics (Getting to the race site): Getting to Chicago is easy with major airports, roads, etc.
Swag (medal, t-shirt, other items for finishers): Finisher shirts are OK, not great. Would be nice if they had finisher jackets like other majors. This was 40th anniversary of Chicago Marathon so the medal was very nice.
Food and drink (on course and after finish): Food and drink on course is fine, and standard bags provided afterward are efficient and convenient.

I provide running and racing resources for all levels of runners at www.askrunguy.com. I also share information that I believe is interesting and helpful to the running community. I encourage you to visit www.askrunguy.com