I enjoy the human cast.
I find the monster average a bit subpar. I just don't find it as entertaining as the previous movies. Though, most of the fights with King Ghidorah during the Showa series are a little on the boring side.
I like the Xiliens, I don't like their costumes. THey're interesting, but laughable, villians. The only issue with their character is you KNEW they were evil when you first saw them. They could have made them seem a little more benevolent when you first met them.
I'd give this movie a 7.5/10. Around there.
But I, that am not shaped for sportive tricks
Nor made to court an amorous looking-glass;
I, that am rudely stamped, and want love's majesty
To strut before a wanton ambling nymph.