PlayDevil has reviewed Dying Light for Xbox One.
Here is a snippet:
"Dying Light’s strongest suite is the drop-in, drop-out 4 player co-op. Not only do you get some much needed help, but players can also revive each other (making the game far, far less frustrating). Furthermore, you can also fiddle around with several options to mix things up, and setup little challenges to compete against the other players. It’s a fairly simple system, that reminds me a bit of the Burnout Paradise events between races, but really adds to what is already a solid co-op game."