Instead of going into a long, drawn out review, let me sum up "Serenity" by saying that 1) no fans of "Firefly" will be disappointed, and 2) Whedon does a good enough job laying out the backstory that newbies to the Firefly universe will have no trouble figuring things out and enjoying the heck out of the movie.
The film is split more into halves than the standard three acts, which works just fine in this instance. The plot may be confusing at first, but when the second half of the film starts there are no lingering questions and a pantload of great action bits and one-liners. Frankly, the last 45 minutes are absolutely outstanding. The first half takes a bit to really pick up, but it's the second half of the movie that will leave old fans and new yearning for a sequel.
There are some sad moments, some gut busting lines, and some rousing actions sequences that make "Serenity" a wonderful film that really, really deserves a sequel and, perhaps if we're lucky, a second chance on Sci-Fi.
