I believe that this game is being over-critisized. I have completed the game and although there are some flaws it was a great time. I'm a big Alien movie fan and this game does capture much of that joy. You really do feel at times that you are a character in a movie being hunted.
The most fair knock against the game is it is too long. In the end you are doing the same things over and over and it just doesn't keep the magic that is early.
I love the save system and many will disagree. You will sigh in relief when you finally get there. I learned early when you see a save point don't try running toward it. You will lose.
Lighting, atmosphere, and sound make this game. It is not for everyone because it requires what most people do not have in today's world....patience. You will be frustrated at points because it really is hard in spots.
You can tell the people that made this game love the movies as well. It is a unique experience that may not be for everyone, but one that will be in my lists for best games of the year.