Good watch, would watch again, and can recommend.

This was a hit movie at the time, and other than the Xenos design, I'd say it is still a pretty good movie.  The "anti-Jaws" approach of showing the monster off is really cool as the premise is largely how detailed and dangerous the xenos is, but the approach removes a lot of the suspense in the hunting and subterfuge, almost humanizing her as "hunted by the evil government entity".

While it would be a much different, and arguably better, movie to do something more like "The Thing", that she only has one human mask sorts of outs her, making it more like a spy movie, and I think they did really well with that in mind.

It just lacks the level of nuance and hidden information that spy and thriller movies tend to have.

It's much closer to "Aliens" than "Alien".