5-6 hours is all it took me to beat the game on normal!
The enemies were well balanced at times and very easy to kill at times. The bigger enemies were my favorite to fight, they actually put up a fight (Big Sisters), and the loot they drop is just sooo repaying. Switching weapons and plasmids is way easier now and the best upgrade of the game is the fact that you dual weild both hands (weapon/plasmid) so the action is really fast paced! There are some cool new weapons you use only because youre a big daddy like the new machine gun (its so beast).
All and all it was a decent game. The story was short but interesting, the visuals were (bioshock-esque) and the enemies were fun to kill. The mutiplayer will keep you occupied from the story (if you find anyone online to play with) but the story itself could have been a bit longer. The next game I'm going to try out is Dante's Inferno, and I will write a review.