I made it round in 5 hours and 37 minutes. I did 180 miles in training over 40 runs starting on January 12th with a 13 day gap in March and a 22 day gap prior to the race, both due to knee problems. It was just enough to get me through along with some expert help from a chiropractor who I definitely recommend. (Alberto Gonzalez of Gonstead Clinics in London)
The whole event was brilliantly organised from bag drop off to water etc en route and followed a silence for the Boston tragedy.