She looks promising. And her reaction to seeing Daleks for the first time without having the context of them being super-powerful killing machines is pretty spot-on.
It'd be nice not to have every single long-running companion be female, though. That was one nice thing about the Amy-and-Rory years, though it was obvious Rory was there primarily because Amy was, rather than through his own sense of adventure. I wouldn't mind seeing more of an ensemble crew in the TARDIS again - 2-3 regular companions, as was often the case in the old series.