Swinging around with a grapple-hook only gets more fun as the game goes on! (though there are one or two really frustrating parts) and while at first the story appears to be a bit on the thin side, you can hunt around (and learn the alien alphabet) to find added depth and details that really enhance it. While the game is very linear, I would recommend playing it again soon after completing it. Having mastered more complicated puzzles and manoeuvres in the later levels, you'll find yourself swinging freely and effortlessly through most of the game, removing a lot of the challenge (and frustration) and making it almost zen-like fun!
This game is worth it for the DLC Justine alone! A short game that condenses all of the Amnesia experience in one level (about half an hour if you don't die - theres no saving or respawning) and an amazing amount of depth can be had from reading/listening to the material left lying around.