Since it seems to be the thing that everyone is talking about:
Steph's new costume. Now, I like this costume! I had no idea people didn't like Steph's utility garter, it's one of my favourite costume elements. It's unique and practical. The low-slung belt isn't particularly practical, but it's cool enough that I'll let that go. And it looks like her boots have steel toes! I've been saying Steph should have steel-toed boots for years, I think they'd be good for her.
I love the colour scheme. It reminds me of Spoiler, obviously, but also of some of Huntress' better costumes. And, of course, the cut is very similar to Barbara's classic Batgirl costume. I would have included more of Cass' design elements, though. Maybe the hollow logo.
I have to say, I was hoping for something more reminiscent of Steph's Robin costume, though. Kind of an updated Betty Kane Bat-Girl, in eggplant of course. I like the skirt-over-tights look.
...Okay, I have to go trek up to school now. And this is as long as I can talk about Steph-as-Batgirl without getting into incoherent capslock with lots of exclamation marks. Steph! In her own title! As a legitimate member of the Batfamily! (I'm still a little worried, to be honest. We all know what happened last time Steph got a promotion.)