I took my 9 year old as she loves the books. I was dreading going myself, but enjoyed it! The young cast is very good with impeccable comedic timing. Cosmogr, I think both you and your DD will enjoy it.
I took my children (ages 6 and 9) and they both loved the movie. There is some gross boy humor but nothing too horrible. I thought the movie was very cute and the actors did a great job. Rowley is such a loveable character!