I believe it's a good film for that time period, the acting is ok and the green screening isn't to bad, I didn't like how there was not a real ending to the film, when this movie came out in 1963 the special affects were probably really good, but comparing to technology today, I am pretty sure if there they made a remake, it would be so much better. Also, the fact that it's a 'horror' film, there should have been more horror like more dead bodies and blood.