A few corny parts toward the beginning had me a bit worried, but once it really got going, I was very impressed.
I'm seeing all sorts of nitpicks. I agree with some, (which would be spoilers to address), but overall, I loved the writing and the story. I love how it repeatedly defied expectations without getting unbelievable or stupid.
I'm weirdly not anxious for the next film because this one left me feeling so satisfied.