How great is this? I spent most of last night playing this and can safely say I enjoyed it significantly more than the main game. The campaign was a just the right length, the new power was great (so awesome flying through the city) and the story was well narrated by Zeke.
The only downsides were the lack of enemy types (just two is not cool, was hoping/expecting to see a lot more freaky monsters) and locking out powers was kinda annoying (but understandable, having them from the off would have left you very overpowered).
Anyway, just wanted to recommend this to anyone who hasn't played it. Buy it, you will not regret it.
Also, what are the chances of another episode? Would love an sci-fi themed episode.