I'm a huge fan of the Hitman series and for me it doesn't disappoint. It does call for some patience, something most gamers won't enjoy in this want it now world. However, this game does a good job of mixing things up. The graphics are updated, the methods of achieving your objective can vary according to your play style. I don't think there is much replay value after you finish the game due to a lack of multiplayer but who cares. Its certainly worth the rent and the challenge I think you'll enjoy.
I loved the other games more then I liked this one. that isnt to say this one isnt fun or good its just different. the disguises being fickle and you have to be careful walking around because you dont have complete anonymity and I feel that it does take a bit way from the victory when it comes. it doesnt feel as complete to me this way. I loved being able to get the right disguises and blend completely with the environment. it is your choice if almost getting caught breeds frustration or a tense atmosphere. the game also changes the character of 47 in ways I didnt enjoy. it just seemed to me that he would not behave as he did in the story. but this game is worth your time.