Very hard, yet once you learn the game mechanics it does get easier.
However, whilst you have no control over saves, it does save at varying points. This is welcomed as you will use these regular as the game is buggy (no pun intended).
It is faithful to the movies, and does bit a nostalgia trip at points. The look and feel along with the tense atmosphere does make you jump.
I did enjoy the game, however it won't be for everyone - even the movie buffs.