This episode epitomes the series sense of adventure, creativeness, and originality. The viewer is treated with beautiful and creative landscapes, and gets to see the old world charm of technology and unique creatures. The episode brings in many good characters and ties in many plots throughout the series. It is also the gateway to a new start in the series that leads to the stories of living in Ba Sing Se (the largest city in the Earth Kingdom, and possibly their world).
Character development is deep, and action is good. There is even romance and many plot tie ins. So you will want to be knowledgeableof the series before jumping into this episode.
The episode also makes great use of a cliff hanger at the end of the episode, so be prepared when watching anything in this series. It's hard to start right in the middle.