Though often reviewed as a typical "odd numbered" Star Trek movie (for some reason, the even numbered movies in the series have performed much better than the even numbers), Star Trek: Insurrection is actually a rather strong forte into the Trek universe.
The conflict of this film works on two levels: First, there is the conflict between two races of people (a plot point as old as time but one that, if done right, can be quite effective). Second, there is the conflict between Captain Jean-Luc Picard (and thus his crew) against upper-ranking Federation officials, who want to violate the sacred Prime Directive of the universe. Both of those areas of conflict, acting simultaneously throughout the movie, are surprisingly effective and compelling.
Besides the effectiveness of the main plot, however, this film also (much like the previous First Contact film) contains some interesting and humorous character development. While trying to rescue a persecuted race of people, the crew of the Enterprise investigates a planet on which the effects of aging are reversed. Thus, while the android Data is unaffected, other characters are taken on an interesting hormonal journey: Worf begins acting like a typical (violent!) Klingon youth, Crusher and Troi notice certain, um, body parts firming up, and Geordi LaForge regains the use of his natural eyes.
To conclude, Star Trek: Insurrection, while generally regarded as a sub-par effort, actually breaks the "odd-bad, even-good" chain of Star Trek movies. If you are new to the Star Trek universe and are interested in this movie, I would recommend watching the previous film, First Contact, in order to get a better handle on the Next Generation characters before watching this film. If you thoroughly enjoyed First Contact, this movie (with its action/adventure combined with great human drama and humor) will not disappoint you.
