The story (and entire game) is very short, but it's fun to play through. Takes less than 30h for 100%.
Most characters stay very secondary or in the background with no depth or development, but the environments are complete and unique (I actually love the bayou, it should only be a little more dangerous). The original game mechanics are for the most part really cool to play with.
No fast travel so it's a good thing the map is small. Sidequests are just okay bordering on meh. Collectibles are not too many, but they're never given a reason in the narrative (why am i buying watches???).

Assassin's creed is much much better from the others because you play with a female and is an epic story all of it.

Enjoyed the game quite a lot.