One exchange between Luffy and Boa Hancock sums up the Friends' Whereabouts filler episodes of One Piece:
"Hey, have we gotten to Ace yet?"
"No, it'll take some time before we get to Impel Down."
On the plus side, this episode has an actual plot, instead of being a pointless diversion. This may be some of my prejudice toward Nico Robin showing, but the story of this episode was much better than the "stories" in the previous episodes. There was actual emotion rather than random screaming and comedic interludes.
We just have one more week of filler, with Zoro and Brook's stories. Keep the faith, One Piece fans, it's just two weeks until Impel Down!