Arkham City has been sat in my library since it pretty much came out. Although 99% of people who will read this review will probably already have City, it will just be a case of trying to persuade you to finally dust it off and complete it.
I have poured thirty two hours roaming around Arkham, it's a stunning looking game, even for current standards. The Arkham style combat system is at its best again, similar to Asylum, you can pretty much master the system when you can work out how to time your attacks perfectly, but you can add in plenty of combos to keep things interesting.
The main story is only one of the features here, I thoroughly enjoyed the main plot, with lots of twists and turns that keep you guessing right till the very end. Like most open world games, there is plenty to do apart from the main story though, tons of side missions, collectables and challenges that will keep this wonderful game going.
If you have the Game of the Year edition, you'll also have all of the DLC too, while some of it is useless in my opinion (the challenges) the story side of it is well worth playing through as well.
Basically, if you don't have Arkham City...well, where have you been for the past few years since it almost always goes on sale for at least 75% off, and if you are part of the majority who have it, I highly recommend you put aside a few days of your busy life and play this amazing master piece.