I had the rather jarring experience of simultaneously feeling "OH NO LIN MY HEAAARRT" and "HOLY FUCK ZUKO'S OFFSPRING AW YEAH"

Other than that, kind of same old/same old. Mako is a douche, Asami is awesome, neutral on Korra, needs more Bolin, Tenzin and Lin kick ass, and Naga is my favorite.

Here is a longer and more in-depth reaction post on my journal; feel free to read and comment here or there about it.

I liked this ep. The pacing is a lot better when the story spans a few hours' time rather than days or weeks.