Oh hey, Dai-Gurren. No, seriously.
The episode on the whole didn't necessarily blow me away, but the reversal of Ryuko and Satsuki for presumably their final battle against each other before joining forces to take down the real enemies closed it up beautifully.
Also nice to see them use some more of the vocal tracks from the soundtrack that haven't gotten as much air time. That scene of Ryuko's memory being rewritten was actually a little touching between that element and the images of what could've been if Ragyo wasn't such a deranged monster.