The first tiny bit where the Earth is seeded with DNA was the best bit, and perhaps, the last few seconds, where the Alien of good films is born, was OK. Everything in between was crap.
So glad I only paid a couple of quid to borrow the DVD, instead of paying through the nose for the cinema as dh and I had intended to do.
Ridley Scot, you should be ashamed. ASHAMED. I am very cross with you, and I shall think twice before I bother with another film from you.