Really loving this game, have over 25 hours play time, and only 40 odd percent through.
Think they made the zombies pretty spot on, the cannon fodder ones are just dumb and amble about - easy to overcome, but can easily overwhelm you, really make you feel like you're in some sort of classic zombie flick.
The free running is actually quite enjoyable, and very handy - it's comforting to know that you can easily get yourself some high ground to take a breather

The gun play feels quite clumsy, but we'll implemented - I like how it's a double edged sword; insomuch as it can draw unwanted attention easily.
This is my game of the moment for now, hope the season pass stuff adds many more hours of enjoyment!