Ok just played the first 2 missions now. Here is my short "review" for how its going so far.
Game starts off well, graphics, movement and sound feel authentic. Quite a scary experience for the opening, get your blood pumping.
The first thing that threw me off was the horde encounter of Aliens. It saddens me to say that the aliens animations feel rather... human. Although they still crawl on walls and leap, they don't feel like the slithery slimy aliens from the movie. In my opinion, I feel that the recent AVP reboot got the aliens' animations and behavior much better than this version.
I'm trying not to give any spoilers away, but the games general pacing and combat reminds me of Half Life 1 & 2. It would have been groundbreaking for a couple of years ago, but it feels like the mechanics have dated and that I'm playing a 4 year old game...
There are a few positives though, as the game itself is not horrible. Definitely not as bad as DNF, and I can imagine the co-op being a blast. Level design seems good so far, and the attention to detail really saves it. So far I'm enjoying it, will carry on later this evening.