Asked about the demo codes, my good man... no reply just yet. I'll definitely hook all you guys up first if I do.
As for the free running, that's a pretty good description I suppose. It takes a lot of getting used to, because when you run and jump you don't always end up where you expect. It's more realistic, so you won't be able to grab onto everything you expect. It's harder to navigate than Crackdown, but then again your guy can't do gigantic jumps and such so it works.
It's pretty nifty being able to latch onto trees and light poles. Also, when you jump on top of something you can't easily fall off, thankfully- because you end up on a lot of tiny perches and it would be a bitch.
Combat's pretty fun once you start chaining together all the powers, but it's simplistic.
Still, the demo's fun enough for me to go back and explore once more. There seems to be a bunch of little things scattered around like the orbs from Crackdown so there's incentive to look around.