The city is big and there are lots of attractions to do. Visit museums, go to Six Flags, go to see the pyramids or take the city tour buses etc. I stayed there for nine days and went out every night. The night life is incredible, people there know how to party. People are polite and friendly, they can help you if you need, but not so many people speak English, a little Spanish may be helpful. The city is safe, do not be afraid to go there.