Saw this last Saturday.
TBH, better than my original expectations. Fairly solid cast, Physical and CGI effects were not bad at all and certainly better than the AVP films (not a hard thing I suppose).
Adrian Brody was definately better than I expected - yes he is a very capable actor (looking forward to Splice when it hits the UK) but its not the role that you would normally consider him for. The story develops as you would expect, no real surprises but still fairly watchable.
Its definately a "do not engage brain" film, but thats not always a bad thing. Suspend belief and enjoy I suppose.
For me it was a solid 6/10.