Extremely good as always. Ignore the 'its too short' arguements.
Also the commentory, which Gamespot says sounds 'rehearsed' (although it obviously is this is no bad thing as it isn't meant to be a dvd style commentory) is very good and a welcome features.
Very occasionaly I found the game dragged on in a few areas (especialy the elevator sequence you encounter fairly early on in the game) but this is realy just nitpicking at a masterpiece.