I recommend just watching this for the experience. What was surely considered to be a scary movie back in the 1950's is in this day and age quite amusing but nevertheless still very entertaining. It may have been predictable but the acting was pretty good even if the teenagers were played by full grown adults (Steve McQueen's character looked the same age as the police officers) and some of the emotion definitely got across. The blob itself is quite entertaining with the movement they put into it and I actually found the way they did the ending, suggesting there may be a sequel, very amusing too.
7/10