Go watch dark knight instead...
This is acceptable, anyone claiming it to be an 'epic masterpiece' is clearly in denial . The second film was the peak, this is just cheesey, predictable and bad.
If you only saw this film it would pass for entertainment (hence 3 stars) but as part of a trilogy, it just wrecked it.
I'd of course reccomend you go see it for yourself, but at least be honest with yourself afterwards.