The only downside that I would put it is that the world is not persistent. We kill a patrol on a road, but in the end a minute later, another arrives, then another two minutes, etc. Everything appears unlimited amount, even wild animals to hunt (especially sharks, which is not practical when you have to dive to get a first skin that just killed and a second attack us surprise). The appearance, but also the disappearance. Just 30 seconds away from the place of carnage for abandoned vehicles and the corpses have been cleared. Convenient cleaning service but not top level realism.
Otherwise, the story mode, except the first quest after which we can finally go on an adventure, I have not done anything yet, so I would not say anything about his interest. By cons, dubbing the type who did so much about him with his definition of insanity ... And he tirelessly repeats bah I find ridiculous, such a sketch of Eric and Ramzy missed that want to play the guys. I laughed at the intro session where it makes us small talk when we are in a cage. For me, that night really serious tone that it wants to give, but it's okay because I'm not playing for history.
So 5 for the open world I expected, -1 for non-persistence, it's 4