Picked it up this afternoon and I can't put it down. I have to say, it's exceeded my expectations by far. The first two did bore me a bit, (like I mentioned) but this one is quite a bit different. Great story line, awesome graphics and the soundtrack/sound effects are mind blowing.
The story really sucks you in. It has the feel of Red Dead Redemption to it...
You can hunt, ride horses around the woods etc. I just beat a level where you command a huge ship around Martha's Vineyard and battle a couple British Frigates. Really impressed with the effort they put in this one.
So far I highly recommend this game.