Just watched it again yesterday - it's striking how good the action is compared to the ridiculous dialogue. I completely understand why this movie got such terrible reviews; after all, it marked the first "let's make a quick buck" entry in the two beloved Alien and Predator franchises and was done by a director who many felt didn't treat the material with the respect it deserved. When I watched it yesterday I got angry at times because some of the dialogue - well, most of it, actually - is truly awful. It's hard to take characters or a story seriously when nearly every sentence spoken resembles lines from a parody of cheap science-fiction and horror movies from the fifties and sixties. But despite all those flaws I have to admit I enjoyed the movie from start to finish - because of the amazing set- and creature-design and the more than decent action sequences and special effects. Whoever designed those really scored and seems to have a great love for the art of Giger and the previous films. So if you can get past the silly characters and you're able to ignore the more obvious shortcomings (like the idiotic decision to make the film PG-13) you're in for a fun ride. My vote: 6.5 out of 10.
Favorite films: http://www.IMDb.com/list/mkjOKvqlSBs/
Lesser-known Masterpieces: http://www.imdb.com/list/ls070242495/
Favorite Low-Budget and B-Movies: http://www.imdb.com/list/ls054808375/
Favorite TV-Shows reviewed: http://www.imdb.com/list/ls075552387/