I've used it in three of my four marathons. The key though seems to be predicting a realistic target - I finished my second fastest marathon comfortably using Marco with a five minute negative split. I then tried to go for a faster time with the same method and I just couldn't speed up enough in the second half so finished with a small positive split. It was still a PB but not quite what I was hoping for. This was at Chester where there is a bit of a hill in the second half. I am a big fan though, it gives you the confidence to hold back first half with a real plan and seems to make the experience much more pleasant!
Stayed at travelodge preston park in 2012, perfect for the start, the walk back hurt but was really good for the muscles. Booked up this time. Was thinking taxi but didn't know if enough roads woils still be open to get to Preston Park. it was brilliant how the whole city got behind the race, it must bera real pain for the locals!