Far from great,But far from rubbish too...probably the best of the rest bar Alien and it's sequel.
Some great filming in going back to not really seeing all that is going on and good concentration on the aliens themselves in creating the horrid things that they are.
The cast were very good and for me 'Andy' was excellent in playing dual personalities as a synthetic.
Couple of criticisms :- far too much use of an original member from Alien, and please,please,stay away from any one liners which were in any of the previous movies,very tacky that!
Otherwise a good film and well worth a visit to the cinema.