I was never a fan of GMR, and I think in many ways this is an improvement. It's just disappointing that the ride is so short in comparison to what it replaced.
I also think that most of the ride is great and well done, but the dance break makes zero sense and destroys the pacing. It's cute, but it felt like it was really a case of "oh, crap, we paid a s#!t ton of money for these rvs which have all these things we can do with them. Let's shoehorn in a way to show off what they can do!"
I didn't mind the character style they used, but the AAs look odd in that style.
The pre-show cartoon was cute, but it made me wince a little with Pluto in the trunk of the car. I know it's just a cartoon, but it seemed like a weird oversight of pet neglect/abuse.
It reminded me in the best ways of classic Disney dark rides like Mr. Toad, just with new tech.