via Internet Archive:
Moria praises the fight scenes and the climax and opens by putting the film in some context:
Terror of Mechagodzilla was the fifteenth Godzilla film. It was the last of the classic Godzilla films – after this the series went into retirement for nearly a decade before Godzilla was revived with a new series of films, all made with much better effects, beginning with Godzilla 1985 (1984). Terror of Mechagodzilla was the final film (at least final credited film) for director Inoshiro Honda who had created the very first Godzilla film and directed all but two entries throughout the 1960s.Stomp Tokyo says this movie
is actually a step up from what came before. The special effects are a little better, the story moves a little quicker ... and the whole production just seems classier, probably thanks to Godzilla director Inshiro Honda's return to the series after a long absence.Million Monkey Theater doesn't like it and has a lengthy plot summary. 1000 Misspent Hours gives it a positive review, saying, "it is tremendously satisfying to see that Terror of Mechagodzilla/Mekagojira no Gyakushu, the last of the 15 Showa Godzilla movies ... recaptures so much of the series’s lost glory".
HT: SF Signal Sunday Cinema