My opinion might be a little biased, but I absolutely loved the movie. The plot wasn't as good as 2014 Godzilla or Kong: Skull Island, but I appreciated every action packed scene.
If you like watching giant monsters fight, then you will most likely be a fan of this movie. If you care more about the character development of the humans involved, you probably shouldn't be watching a movie called Godzilla: King of the Monsters.