I saw this yesterday and it was a definite call back to the monster movies I watched as a kid back in the 70's... especially GHIDORAH THE THREE-HEADED MONSTER (1964), INVASION OF THE ASTRO MONSTER or as I remember it titled MONSTER ZERO (1965) and DESTROY ALL MONSTERS (1968). I have a great fondness for those movies, and this new movie is basically a love letter to them. It is worth seeing for the CGI versions of Godzilla, Mothra, Rodan and King Ghidorah -- whom they actually refer to as "Monster Zero"! What I loved was how much they kept the same: the way the monsters looked, Godzilla's roar, and even (spoiler) that Monster Zero is from outer space. What I didn't like was the paint-by-numbers human story and all of the cringeworthy explanations and motivations of the characters.