I completely hated it. The only thing going for Alien 3 is the clever idea of the Alien Dog, all the rest is just horrible.
In fact, David Fincher (the director) hates it too. He said of his own movie that it was one of the worse, if not the WORSE of his entire career. Similar case than Robocop.
The original script implied all the survivors from Aliens are alive and Corporate Hiks was going to be the star of the show, not sigourney weaver... and that wasn't fun for the actress who was also happen to be the producer of Alien 3.
She just wanted to die so she forced David Fincher a script in which every character dies because she wanted to finish the trilogy right there.. like "the savior" so the original script was completely trashed.
Fincher didn't had much time to come up with a new script but nevertheless he made one who was very interesting but, execs again with the help of Sigourney completely trashed the script, they modified a lot.
On top of that, when the movie was about to finish filming, the scenes where the alien was trailing the humans.. as soon as Fincher started filming that, the studio came to him and told him... WE DONT HAVE ANY MORE MONEY SO.. do with that as you wish... so, he HAD to force a stupid, horrible scene of cameras moving like an alien because the studio completely turned on him and stopped giving him money.
The end result was a movie Fincher hated with all his guts. The re-edition that later arrived made the product much better overall. At least Fincher could show some of the ideas he had for the movie.
And.... F*uck Sigourney... she is one of the first responsables to trashing the saga with her Ego.