In my opinion an excellent movie. Although the movie is mostly passed on the same place with the main character in the same situation, it is not a boring (as i was expecting).
If you are interested in watching it, i surely recommended.
Oh and my the way, the amputation scene is awesome! xD
I've just saw it, and, wuau! what a great movie!
The story was very well conceived, and it explains some things from the first movie.
One of the best prequels that i've seen.
Totally recommend it.