I just watched it.
Some things were Hollywood hokum. Can't get away from Hollywood hokum because Hollywood folks tend to have little conception of how basic physical processes work and to think pictorially, like for a comic book.
But some of it was accurate and good. They had correct plane types. They mentioned little things that a lot of people don't know that could have had a major impact, like the Japanese not taking out the fuel tanks and what that would have meant, and the B-26 from Midway narrowly missing crashing into Nagumo and taking out the Akagi. It even had occasional things that I didn't know (and I've read several books on Midway and a book about VT-8), such as Eugene Lindsey's crash prior to the Midway mission and still going on the Midway mission.
Overall, it was in a completely different league than the likes of Pearl Harbor.
Also, I respect it because it was a project of passion for the director. He was very interested in Midway and read a lot of books on it. He wanted to make an accurate movie. He worked for years to get funding lined up. I respect that he worked to get it made, with a desire for accuracy, and did the best he could in that regard.