Finished in 4:31. Getting to the Expo was my biggest challenge. You'd think there'd be signs as you come out of the metro station. I didn't think the cobbles caused any issues really. The drinks stations were a pain, more because runners stopped and stood drinking at the tables ????.
There also seemed a lot of corner cutting. Keeping your eyes open for Kamakazi grannies crossing the course also kept me focused.
All in all a great first full marathon experience.