People miss the point, THIS IS THE FUNNIEST BAD MOVIE EVER!!
If you haven't seen this movie before, read no further and go forth and see this movie with the idea in mind that it is the campiest, most ridiculous science fiction film possible and marvel at how anyone making this movie truly thought they were intentionally making a SERIOUS film.
****************** SPOILERS AHEAD!!!!!!!!*********************************
That being said, I just cannot understand how you can watch much of this film and not roll on the floor laughing. WATCH as an Air Force Airman's discarded Playboy and its chance meetng with a lit cigarette starts an INCREDIBLE chain reaction explosion that destroys an ENTIRE MILITARY BASE. MARVEL at the actor George Peppard's thick moustache as he declares the immortal line, "This whole town is infected with KILLER COCKROACHS." LOOK in awe at the amazing special effects, for expample multicolored lighted skies that look like, well, fake special effects of multicolored lighted skies.
Like I said you really have to go into this movie with the idea not to take as seriously as the people who made the movie (which is what makes it funny). Other so called classic bad movies (like anything by Ed Wood), often are filled with nothing but long boring dialogue scenes, whereas this film actually has some entertaing action sequences in between the unintentional humor, including an actually well constructed shoot-out/action scene between our heroic crew and some wasteland bad guys.
SO, in conclusion, for all the aforementionad reasons, this is a must see if you're in the right frame of mind.