This by far is the worst entry in the series, and is not a true Alien film. So I'm going to keep this review brief.
It's not all bad. The direction is good for what it is, and the acting works well with the script that they got. The set design is nice and there's some good special effects for the aliens. The action scenes aren't half bad, either. But the problem isn't with how it's done. It's with what it is in the first place.
Resurrecting Ripley was a stupid enough move, since it doesn't make much sense considering she burnt alive and that the likelihood of her DNA being found as a result was slim to none. But then they give the cinematography this sickly yellow-green look, threw in some cheesy jokes and added the ridiculous mother-daughter relationship between Ripley and a baby alien. Not to mention they made a 180 tonally and choose to make it feel campier than the original trilogy, and then adding in some stupid underwater fight sequences that only made this ridiculous feel worse.
If it didn't have any links to the Alien movies it could be a pretty fun B-movie. But it's part of the Alien franchise. And the words "Alien" and "B-movie" can NEVER be in the same sentence.