Good concept where you run mile loops. Used it as a leg stretch before heading to Paris for the full marathon the following week. Everything was well thought out and from the starting point to the final medal collection point, with a fun pop-up expo next to St Pauls.
Good set of runners with lots of friendly comments and chats, with no big egos on display, just people running the streets a mile at a time.
Would do again if it fell before the next Paris marathon in 2020.