Aside from a dull AI system, Hitman: Absolution provides hours of fun with a fresh story and the new Contracts mode.
Absolution is a great game, but it's one major flaw is the AI. You can act suspicious in a disguise, crouching around everywhere and the AI will only ignore. It seems like they have no peripheral vision and just seem to wonder in there programmed paths. The other minor flaw with this game is one that the developers seem to have with their other series: Kane & Lynch. The shooting mechanics are bland and almost seem robotic. The AI has terrible aim and will often run past Agent 47 just to take cover.
Contracts mode is new to the Hitman series. In Contracts, you can go into any level from the campaign and make your own hits. However you kill the targets you choose, the game will record your steps and publish it into there server as a contract. You can send it to your friends and challenge them to beat your high score. The new mode is almost endless as there are over 20,000 contracts already made, plus some the developer has included.
Hitman: Absolution hits the nail on the head, where others (Splinter Cell, Manhunt, etc.) have hit in the stealth department. Aside from it's issues, Absolution is a great game that some may want to rent first just in case it's not enough for you.