The special effects includes ship launches, dockings, space station shots, a killer fungus, and some rather convincing makeup effects for on contaminated crew members. All work well to serve the story, just remember these are still pre-Star Wars effects and in alignment with what you have see in other 50's sci-fi...
I find this film to be much more entertaining than the supposed classic with similar storyline 'It! the Terror from Beyond Space' made nearly ten years earlier.
Well worth your time seeking this flick out. The transfer available is magnificent and much better than some of the commercial 50's sci-fi titles out there!!
By way of comparison, MIOS is much more engaging than other 50's fare such as The Unknown Terror, The Flame Barrier, or Curucu-Beast of the Amazon. Check it out!!!