Been playing for a few hours now. Holy shit, this game is just huge. Much bigger than I even thought it would be. The map is littered with stuff to do, and as great as I think the story is, I am not even caring about doing the missions. In which case, I actually see why some called it Skyrim with guns because the world is simply massive and the map is littered with locations. The only difference here is that there is actually more of a wide variety of different things to do.
The visuals are hit and miss on the 360, but I find that it plays fine. The first person mechanics and gameplay in general feels great. Overall, I absolutely love it so far and I am barely even scratching the surface. Just gathering ingredients, exploring caves and old bunkers, finding relics, taking over towers and bases, doing side missions, upgrading, hunting, doing Trials of the Rakyat, hang-gliding, etc. The Game is simply ridiculously good. It is not just huge for the sake of being huge, it is literally dense with locations and different things to do.
Only gripes are jeeps of doom (because they hear my gunshots) and all of the pop-up reminders. These are just minor niggles that in no way takes away from what an ambitious game this is, though. I'll be playing this one for a long time to come. A keeper if there ever was one.