Low-budget special effects in Godzilla movies are part of their charm, where the rest of the movie is just filler for in between the scenes where a big guy in a rubber suit stomps on a model train set until he either gets beaten up by the good-guy monster or perishes at the hands of plucky young children in short pants.
Here all you have is the filler, and it isn't much. Vic Morrow tries to interject a little dignity and professionalism into the flick, but is done in by wretched special effects and a terrible script that may have been better in Japanese but I wouldn't wager by much. This movie was made about fifteen years too late, after "2001" showed that the future could be realistic and without huge tail fins.
This movie is even worse than the abysmal "Fugitive Alien" flicks shown on MST3K. (which was edited from a TV series, which probably explains a lot) And it has a robot that is so annoying that it makes Twiki from Buck Rogers seem like Obi Wan Kenobi by comparison.