How authentic is the dialect in 光が死んだ夏?

Looking for anyone who knows natives from Mie prefecture who have seen the new Netflix hit "the Summer Hikaru Died".

It's all in the beautiful Mie dialect, but I know the main voice actors have nothing to do with the region. They worked with a dialect coach, but obviously there's only so much they can do. I was wondering if someone from the prefecture would easily be able to tell that they're not from there or whether they actually did a great job and are very close to passing.

Just to clarify, I'm not only asking about if the grammar used is authentic, but also if the accents of the actors are believable or not.

by Realistic_Bike_355