The third film in the so-named "Cornetto Trilogy", with the other two being Hot Fuzz and Shaun of the Dead, The World's End is a fun film, but not without it's flaws.
It has the same fun tone as the previous two films, with what I feel is strong cinematography, fun references to ongoing, and enough changes that people who have see Hot Fuzz and Shaun of the Dead will be able to appreciate them.
One of the biggest changes is the switch between Simon Pegg and Nick Frost's characters. Where Simon Pegg normally plays the no-nonsense straight man, in this movie that role is taken on by Nick Frost, with Pegg playing a man-child who can't let go of his teen years, and whose been going through some rough times, and Frost plays his former best friend and the two have had a falling out.
My biggest problem with this movie is that it feels like two movies, and each film could have been strong on its own, but being put together they fall kind of weak. The first film is about a man who is trying to recapture his teen years, and bringing his band back together for one last hurrah. The other is a film about a small rural town in England being silently invaded by robotic replicants. While Wright does a good job of keeping the tone of the film steady, it doesn't make the shift between the two acts any less jarring or feel any less forced. Despite the jarring shift, however, the film does a fairly good job of keeping the ball rolling up until the weak climax of the film, which was a disappointment for me as I've thoroughly enjoyed both of the other entries in the trilogy. I won't spoil anything, but if you've seen the movie you no doubt know exactly what I mean about the climax of the film.
That said, it's a good movie to see on the big screen and I strongly encourage everyone to go and see it. If nothing else, the acting and the action sequences alone make the film worth seeing.