I never really liked her, unfortunately. Between her and Smith, I've actually kind of been turned off the show, even though I love Capaldi, I haven't watched in in a long time.
I kinda like her, but she doesn't have the chemistry with the Doctor that Rose, Donna, or Amy Pond had. Which is a pity because she's been with two Doctors so far. I loved Matt Smith's run, and I think Capaldi makes for a fantastic Doctor, but the writing of the last series has been really sub-par. Here's hoping series nine picks up.