Not bad, not great either!
The puzzles in this game are designed to test your brain. They are hard, but not impossible if you just think and/or experiment. You have all the clues at your disposal in the History (Tab key) menu.
The combat is where it falls short, it's pretty lame, but it's not the main part of the game and I suspect is just in there because it could be. It becomes more of an annoyance after a while, stopping the flow of the adventure. The graphics are nice, and the voice acting seems adequate. There are a *lot* of cutscense! Practically everything you do triggers one. You have the option of skipping them, but I would not recommend you do so the first time because of the clues and/or story advancement.
All in all, if you are a fan of the movie and adventure games, you will probably like this. Although I think $19.99 would be a more suitable price (esp. after the included movie ticket expires!). Note, this game is based on the movie, not the book.