I really like this event. My first time on 03/12/16. It's a nice concentrated size, well organised and has a good vibe. The course around the Olympic Park has some great sites to see as you go round. It is three laps of the same course, so that's something to bear in mind - though you know where the small hills are ready for the next loop after the first lap. In terms of price point, it's very good value compared to some of the others out there. And I'd imagine that people go each month and start to build a network.
Great course, loved it!