Batman - IS FREAKING COOL!
The game is Imerssive, its fun, its cool, tons of stuff to do, the side missions dont feel like sidemissions at all - and there is a-lot to do. you even feel like you choose to do certain things even though the game is a linier game and not sandbox.
about the bosses, yes they are pretty easy as said (never died on a boss) but the + Game mode that is unlocked after you beat the game (I didnt yet) is suppoused to give an answer to that - meanning, you get to play the game again - when its hard, without waiting for the gadgets to come overtime, and i think itll rock.