This is the story of a little trash compacting robot left on earth for 700 years to clean up all the trash. It's a great story, great sci-fi, excellent animation and a good watch.
This movie will be a great addition to any collection, especially if you have kids. No objectionable content that I could see, and it has a great ecological message, if not a bit exaggerated. It also presents a future where a single company controls everything from food, service, and transportation to the government itself to nearly disastrous effect.
I give this movie 9/10. I have been wanting to see it since I first saw the original teaser trailer like last December or something. A great movie, another Pixar classic.