I saw the movie today. It was very food. It had a few small issues, like pacing problems in the middle, but overall I liked it good deal. I don't think Killmonger is quite as fantastic a villain as some people say, but he was good and better then the standard MCU villain (though from recent movies I think I found both Ego and Hela to be more entertaining, even if Killmonger was written a bit better then they were). I got a bit annoyed by the whole "Person is loyal to the crown regardless of ethics" thing, too. Rational good people don't follow obviously evil people because some ceremony was correctly observed, so Okoye lost a lot of my respect/interest with that. To be clear, this is the exact same issue I have with the Shi-ar in Marvel Comics, its not a specific Black Panther related gripe. The third act CG fest, while decent, was also a bit of a let down. I wish the Panther v Panther fight had used some practical fighting.
I liked all of the supporting cast. Shuri was 5000% better then the arrogant doofus version from the comics, if the comics would add one MCU think to them I'd want it to be completely retconning Shuri into the movie version. Ross was very good for what his role was, although obviously not quite enough for me to remember or google his characters name. M'Baku was also a surprising standout even with only a few scenes, I'm curious if we'll see him become a villain in sequels like he is in the comics. Klaw was hilarious, Andy Serkis did a great job.
So overall I think this was a very good movie. It has a few flaws, but overall it was a good experience and I hope it gets sequels. I voted A-.