Just beat this tonight on the PS3 and I have spent the last three days playing it... managed to get 48% of the trophies in one play through on Normal, the game was paced perfectly. The puzzles and cut scenes all balanced and each boss battle had the right level of difficulty to let you know when you died it was your fault and not the games.
Infact at no point in the game did I feel the game had glitched on me.
I shall be beginning this game again on the Harder difficulty after I have gone through all the Challenges. Looking forward to playing as the Joker as well, Mark Hamill I salute you for such an excellent job in voicing such an amazing character.
The suspense created in the game as well was excellent, especially in the sewers with Croc, my little brother (8) left the room as I was playing the surround sound scared the bejesus out of the poor lad, he loves Batman though, so I have got him Lego: Batman to quench his thirst for Batman.
But back to the game, I played the demo and enjoyed it... but played the game and was blown away.
If I had played this properly before voting for my game of the year it would have been in the top 2, behind Uncharted 2... Its THAT GOOD!!
Well done Rocksteady, cannot wait for the sequel.