An alien who appears to be a man lands in the middle of New York's Central Park and tells us that he's here to save the Earth. It takes another hour and a half for him to reveal and us to realize 'from whom'.
What worked: I added marks for being a little more sciency than much of what passes for science fiction today. I also actually liked Keanu Reeves as the detached alien. Given the situation, there was little hope of him acting entirely human. The response and response team of the government was almost realistic. The little kid. John Cleese. Some actual thought and philosophy.
What didn't work: Jennifer Connely as the astro-biologist. What? Why did GORT have to appear as a super-buff humanoid? I'd have thought we'd learned by now that robots have no business looking like humans, especially if they're coming from a non-human planet. I didn't like that the government was portrayed as quite so heartless. The overall feel of the movie was a little too deliberate (plodding?).