Ha ha, I like that race profile "pancake flat" cause it is. I ran this last year and this year in hopes of qualifying for Boston. I did so this year, in 3:39:03- less than a minute to spare. It takes longer to run a hilly mile than a flat mile, so if your running time is on the cusp of BQ/ not BQ (like me), a flat marathon will definitely make a difference.
However!! The race is in August, so it's very possible that it might be a hot summer day, in which case you may run considerable slower. Lucked out with weather & overcast day this year in 2013.... It's pavement. I found myself gravitating towards, and running on, the just-past-the-pavement dirt as much as possible. (Dirt less jarring on the legs and knees than pavement). Which may have contributed to- according to my Garmin- me actually running a distance of 26.58 miles. An extra third of a mile for not "running the corners", that is, the 'inside lane' of the course where the course is measured from. (Extra 1/3 mile translates into bit over 2 minutes for 8:10/8:20 mile, makes a big difference if you're trying to meet a Boston Qualifying time!)
It's 9 loops around the lake, which may drive some runners batty (repetitive). Only about 400 runners, not crowded. Gun time, no chip. Race is put on by Sri Chinmoy Marathon Team. There is a spiritual vibe to it... some individuals and small groups of 2 & 3 play music (with a spiritual bent) along the course. A drum and guitar duo at one spot. A few hand held drum individuals, a man with a sitar, another man with a violin...