Big sightseeing plans ran into the wall of São Paulo’s traffic. We did do some sightseeing at 11 pm in the backseat of a friend’s car after a huge feast, though those photos did not turn out. São Paulo is pleasant-enough, it is just crippled by traffic. Best advice I can give is base in one neighborhood, aimlessly explore, and don’t get too ambitious with sightseeing plans.
We found restaurants in Brazil to be quite expensive for what was on offer, the best values we found were various all-you-can-eat ‘rodizio’ menus, from barbeque to sushi, we would have lunch and skip dinner. We liked best the ones that generally serve a la carte but have the option for rodizio. A Japanese place near our hotel, the Park Inn Ibirapuera was sumptuous.