I just watched the movie. I liked it! I think I liked King of Monsters more but this is still a great movie in the series (I have a feeling its the last movie though). I know some critics complained about the human story parts, but honestly I liked them and it, while a little goofy with the Godzilla Team (as I am dubbing them), advanced the plot and clued you into what was happening. The Kong Team was a fun exploration of this world and ties in well with the Godzilla Team's separate plot. The kaiju battle are great, the story is decent, and it was fun. My only nitpick is there are one or two scenes of Kong that seemed like it was in slow motion when it wasn't suppose to be, but other than that everything was great.
If I was to rank the Monster Universe film I think it would be:
1. King of Monsters
2. Godzilla vs Kong
3. Kong: Skull Island
4. Godzilla
Honestly I only moved Skull Island to 3rd place because it was more fun than Godzilla, but I think the Godzilla movie was more respectful to the original film from the 50s and is still a good movie.