Twilight is a movie that is adapted from a series of books that are mainly aimed at teens or young adults, setting teenage love drama in the world of vampires and werewolves (although the wolves are only hinted at in this movie). It stars Robert Pattinson as Edward Cullen, a vampire who is over 200 years old but perpetually stuck as a 17-year old, and Kristen Stewart who plays Bella Swan, a teenager whose parents are divorced, who just moves in with her dad in the Pacific Northwest, and ends up going to school with Edward and his "siblings" played by Ashley Greene, Nikki Reed, Kellan Lutz, and Jackson Rathborne. Of course, Bella and Edward fall for each other, and chaos (and sappiness) ensues. Taylor Lautner plays Jacob Black, a member of the local Native Americal tribe who also falls for Bella. His role in this movie is limited but gets more extensive over the course of the series.
The movie is decent to good in some parts and bad in others. Despite having a cast with people who have proven acting chops (including Anna Kendrick, Peter Facinelli, Sarah Clarke (whom fans of the show 24 will recognize), and Billy Burke, it definitely suffers from some of the clunky dialog carried over from the books or made worse by the screenplay. And, the special effects have (at times) a lot to be desired for a big-budget movie. That said Pattinson and Stewart have very good chemistry (they would actually start dating while filming the movie) and did their best with sometimes very limited material to work with. They were both still pretty young when the movie was filmed (especially Stewart) and each has grown into being very good actors beyond what was shown in this film. Another issue with the film is that the ancillary characters truly do feel ancillary. They were always trying to get to the next scene between Edward and Bella and so the other characters (especially the other high schoolers) really did just feel like filler. Kendrick had a couple of good snarky lines, but beyond that, those characters were pretty useless.
For those who get the Blu-Ray, the movie looks and sounds great. Especially the cinematography. As I said, some of the special effects left a bit to be desired, especially when the vampires were moving fast (superseded is done a lot better on the Flash TV series), but still I think the movie is worth seeing in the HD format. There are actually a ton of extras, including a commentary track on the film with the director, Pattinson, and Stewart, deleted and extended scenes, music videos, an almost hour-long making-of feature, a feature on the movie at comic-con, the trailers, some promotional material. All in all a good amount for people who like going through extras.
Overall, the movie is good, but not great. Obviously, anything that is adapted from a series of novels that are aimed at teens is going to have a lot of people that love it and a lot of people that hate it. I think that the movie can be enjoyed even if you are not in the target audience if you know what to expect. It is mostly a love story, and one set in high school at that, and while it does have some action and a bit of violence, it is not a gory horror movie. That said, it is worth a look.