If you really like Arkham Night or Red Hood then get this, I personally really like Red Hood. He plays like a Batman with guns. The missions took me around 15-20 minutes to complete. For most people it would't be worth it but if you really like Red Hood or just really badly want more Arkham Night then it's worth a buy.

The red hood dlc doesn't offer much. It's basically a playable short but with a little story featuring red hood. The cool thing is though that you get to unlock the character for ar challenges.