I'm going to start off by saying that I did not like this film. But then, I didn't like the original film either. Some reviewers seem to compare this film unfavourably to the original effort, but honestly, that wasn't any better.
The good: The acting is, for the most part, pretty good. Kate Moyer, in particular did a brilliant job. Her character, eden, is smug, arrogant, and contemptible, but all of that is down to her ability to portray such a character, and she does it brilliantly. The acting from the remaining cast is fine, though many of the actors essentially played emotionless zombies, so it's hard to rate.
The bad: There are a number of scenes that really push the boundaries in terms of the audience suspending their disbelief. There are a lot of blatantly obviously bad decisions characters make that it's hard to let go. And, the final scene is appalling; a cringe-inducingly feeble attempt at a final scare that doesn't even qualify as a twist.
What others have said: I've already mentioned that this has been unfavourably compared to the first film. I really don't think that was any better, though nostalgia has maybe altered some people's views.
I've also seen a lot of reviews lambasting the CGI. It certainly won't win any awards but it's nowhere near as bad as some of these reviews would have you believe. The same is true of the plot, which many reviews seem to regard as non-existent. There is a definite story told here, albeit imperfectly.
The main reason I disliked this film was the absolute ineptitude of the protagonists. There were so many opportunities to disrupt what was going on. I know the film wouldn't have worked if these things had been easily stopped, but it seemed like lazy writing to not out real, insurmountable barriers in the way.
Overall, not a bad film, but not one I would recommend either. If you're curious though, give it a shot and don't be dissuaded by the overly-negative reviews.