Predators is fun to watch - just don't expect to do too much thinking! I love the special effects - very realistic. I initially didn't like Adrien Brody as the lead (replacing Arnie) but he grew on me - I especially like his mean streak. Alice Braga is hot as the tough and sensible female killer. Those latin looks are to die for! Laurence Fishburne provides some nice twists & Topher Grace is great as the innocent-looking psychotic killer.
Predators should be enjoyed with a big bag of popcorn and lots of friends around you. It is the classic theme of humans marooned, struggling against the elements. I would have loved it to have a nice surprise at the end but it leaves you a bit "hanging in mid-air".
I rated it a 6 out of 10 for fun and escapism. Don't bother with the cinema - it is not worth the expense. Wait for it to come out on DVD and watch it with all the family on a Saturday afternoon.