Ken Scheck’s review published on Letterboxd :
Interesting sci-fi film. A bit preachy at times, and the acting can be stiff, and there is little emotion to latch onto, but the visuals are impressive for there time, much like "Metropolis" had visuals that are stunning for the silent era. The costumes are bad, but so are the ones in "Star Wars" quite often, so that's hard to insult in any sci-fi flick.
I would say the issue I had for the most part, was that it was just too stiff to remain memorable. There just isn't enough for me to latch onto, and that hurts the movie in the long run.
Despite all the flaws, it is interesting for both its message, how it predicted some things right, and how it had some groundbreaking effects, even if they don't hold up as well today.