A couple of years ago, finish is pretty epic and recovery souvlaki is good. Some of the run is a bit soulless (but then I was well out the back, my brother seemed to enjoy it more up in the 4.30 lot), but the locals really get involved and you do get to go past the burial mound at marathon.
The second half is up hill but not too bad. They arrange buses from the center of Athens out to the start, so an early start, but takes away the hassle and you get to chat to other runners.
I'd love to do it again.