Saw this today with my mom. There were moments that felt incredibly authentic (esp. that moment when Lady Bird was like "What's the number? Give Me that number, and I will work my ass off to write you a check." I've had that conversation verbatim with my parents.)
Overall though, Meh. I'm not getting the Award hype (maybe for Laurie Metcalf, who was outstanding). I thought it was slow, and the parts without her mother felt so underwhelming. As others have pointed it, this film kind of falls into that Juno, Virgin Suicides, white-girl indie flick that I would have DIED over when I was 11, but now I just find tired.
5/10