I guess it will largely depend on whether you like the movie. If you a game with similar themes, with the same mood and style appeals to you, then it's definitely worth picking up. It's one of the best movie based games, and the fact it has a completely original story to tell with new characters only works to its advantage - it's way more interresting than following just a game-recap of the film.
That said, not knowing your gaming prefrences, I guess you should be warned that it's not your usual point and click adventure game. From what I remember it's rather difficult, and is really more of a detective mystery than the usual inventory-object-puzzle based game, and the story is not set in stone, you can influence it in a lot of ways, often without even knowing you just made some important choice.