Scary with a great atmosphere. The puzzles are challenging but at the same time quite reasonable.
The atmosphere was great, very scary with good music that compliments the mood well. My wife and I played this game together and really enjoyed solving the puzzles. They are quite sensible in that you know what you need to achieve and have a good idea how it should be done. Some of the puzzles are fiendish and you feel really pleased with yourself when you've solved a particularly difficult one. We were even heard to cheer our efforts at certain points.
Whilst it is true the controls can be a little fiddly we played the game from start to finish on my laptop mostley on one of our laps with one of those touch-pad thingies instead of a mouse. So really it is not to hard to play.
Although the game is scary all the way through and there are times when a shock will make you jump, there are times of humor too. For example, the references to 'Freeman' are fun to find. Should anyone know who he might be :)
This game was so good we've bought the follow-on. It is quality thoroughout and what you miss in a long game is more than made up for in the fantastic quality of the game we have.