The route and the support were great, though the organisation seemed a little poor. There was no clear start line, mile 22 appeared twice (once at mile 22, and again at mile 22.5), and the finishing area was chaos. They also hadn't finished putting out the portaloos at 08:25 when I got to the start area which was causing massive queues - considering the race started at 09:00 it seems a bit late to still be setting up.
Fortunately, for me the positives of the supporting crowds outweighed the negatives.
Blog post: https://jedi58.wordpress.com/2016/04/10/myasics-greater-manchester-marathon-2016