This set has the extended editions of the movies (which were already long) in which Peter Jackon inserts a bunch of deleted scenes into the movies and extends many of the existing scenes. And these are not additions that just add a few minutes to the movies. They are substantial additions that add a lot of material (Return of the King gets an additional 50 minutes added to it, making the run time over four hours). On top of that, there are a TON of extras. Each movie has four separate commentary tracks, one that includes Peter Jackson and the writers, one that includes cast members, one that includes members of the production team, and one that includes members of the design team. Then there are seven different appendices, each of which contains hours of making-of and behind-the-scenes material that can be played in individual segments or all at once. There are 15 discs in all, and even if you just watch each movie one time, you are looking at over 11 hours to just watch the movies. Then you have hours worth of the appendices material. So, as my headline says, this is just for someone who is a die-hard fan of the movies (or really loves watching bonus content). If you are just a casual fan of the movies or the fantasy genre, then this is very likely overkill and more than you will ever want to watch. But, if you are a die-hard fan, this is definitely worth getting and devoting multiple days to watching.