Overall, Moon Zero Two isn't that bad a movie. It is curious that Mystery Science Theater used it as an experiment, albeit an early one. It is a decent movie with a good plot and engaging characters, something 99% of the other MST movies do not have.
The cartoon sequence in the opening credits along with the title song, suggest something along the lines of a Pink Panther movie rather than a science fiction movie. The be-bop jazz soundtrack is woefully out of place in dramatic scenes where something more serious is required, but this is nit-picking.
The fact that the MST episode guide does not talk much about this movie seems to speak more to the film's availability than to its actual lack of worth as a cinematic form of torture. (A similar movie would be "Quest of the Delta Knights".)
No one will confuse this film with 2001, but it's not Star Trek 6 either. I wouldn't set my VCR to watch this movie, but if there is nothing else to watch on a rainy Saturday afternoon, it's worth your time.