First season: We can't fly normally, we need a special device in order to fly. Every season after that: Somehow we're all flying and floating in the air but we won't discuss how.

I found it became much more enjoyable when I decided to "finish" it (after ignoring it for a while) by watching every 5th episode. It was very rare that I missed any story elements because half of each episode was a recap of the recap of the recap from several episodes prior. Stupid completionist tendencies.