How does the subway in Sao Paulo?

Many Muscovites complain incessantly on the Moscow subway and talk about unbearable being there in the "rush hour." I think they just were not in the subway of Sao Paulo. In my opinion, this is a real hell. And that everything is logical - closely, it's hot, underground and it is not clear: what did you all this? We look at the Sao Paulo metro in continuing post!