Having now completed the game and 60 hours of playing time, I can say that this game is great but not perfect.
Pros:
Grapics are incredible. Easy to play, Fun environment, the vehicles are fun to play and drive, especially the buggy with the chute. The story is great but that's mostly due to Giancarlo Esposito. The weapons are cool and fun to use. The treasure hunts are incredibly fun, although at times repetitive. The weekly insurgency is great idea but will get tiring over time.
Cons:
Not enough vehicle customizations, weapon attachments barely change the gun unless using the different ammo types. (Genuinely couldn't tell the difference between the SKS and any of the snipers). At times I felt like I was going in circles looking for clues but that could be just me and not the game. Right of the bat, there's a tree lagging into rocks, and then on one of the hills, there's half a tree that is in the middle of the road. At times I felt like I was playing Breakpoint which isn't bad, but hitting bases over and over again gets to be boring. Finding all the USBs is incredibly frustrating especially the one in Esperanza.
Like I said the game is great but not perfect. I hope that the DLCs will add more to the game and make it more enjoyable than it already was/is.