It was excellent!
Just saw it. Yes it was very good. Long, but it didn't feel like it.
There was a Q&A after our showing with Sasha Lane. No, she has never acted before. Yes, it was basically made up on the fly without much of a script. Andrea discovered her on a beach at spring break and cast her. Doesn't matter, she did a great job. It all felt very natural. Yes, the critics are right and the high ratings on Metacritic and RT are deserved.
Shia LeBeouf and Riley Keough were both great. Sasha Lane is the star. See the film, you will enjoy it!