Listen to me well all those unhappy or questioning about 2 discs!
I bought this upon knowing that these films are all on two discs. I was skeptical at first but it poses no problem whatsoever. Each part is between 1hr45 to 2 hours long. It is done to preserve quality and add the extra content for the movies. This does not ruin the experience at all! They end at good places which you can easily fall straight back into after the change. NOW STOP COMPLAINING ! :P
It is a awesome trilogy, the extra material makes me so happy :) There is a extension on character development at times and a better understanding or lesser characters stories.
BUY IT! You won't regret it! I promise! This is coming from a huge fan of the movies :)