Probably the most addictive Hitman game for me.
I think though that this is better than Contracts, as Contracts was pretty much linear, and it was mostly a visual upgrade of Hitman 2. In some respects, this had better graphics and gave you more options for killing, though wish that there could be more, cause typically there are about 3-4 ways now, maybe 6 or more would be really exciting (though it'd be really hard to do for developers).