The epic conclusion where the races of Middle-earth must unite to prevent a dark power from seizing the mountain. Why Choose the Extended Editions?

The company faces Mirkwood, Spiders, and Wood-elves before finally reaching the Lonely Mountain.

Bilbo Baggins is swept into a quest to reclaim the lost Dwarf Kingdom of Erebor from the fearsome dragon Smaug.

If you are looking for the technical breakdown of the release, here is everything you need to know about the films, the added footage, and the audio specifications. The Trilogy Overview

You get significantly more backstory for the Dwarf company, particularly Bofur and Thrain.

The Extended Editions aren't just longer; they change the DNA of the films. Across the three movies, roughly is added.