Awesome performance of Tell Me. I was actually happy to be hearing the song for once.

Was a pretty nice change, wardrobe was awesome, and Yuri rapping was bad ass.

Liked how they added their own flavor to the performance. Plus Seohyun was kinda... hot. x_x And Sunny did a lot better in the vocals part than usual from what I heard from the crappy quality, they need to get her to sing like that more often as that seems to be a more comfortable range for her. Loved Jessica in the contrasting red dress, though there was something about her performance that was a bit off that I can't quite put my finger on.
Now that I've heard the two groups sing each others songs, it makes the difference in vocal ability of the groups a lot more obvious to me. Not saying WG did bad though since I really liked their performance.
Though the excitement might be due to the fact that I haven't seen them perform in so long, I can't wait to see a HQ version.