Is it a fast course?
Not that fast. 2nd half can be difficult. Rolling sections @ 25km and 30km. at least 3 180 degree turns.
Can be hot/humid. 20 degrees and muggy
As an IAAF Gold race, top 10 finishers get to run in World Champs (if their national federation picks them). So a good chance for some 2:18-25 men and 2:40-50 women to qualify.