Is it just me or do they really really suck. They are pretty expensive to build and if your city is making 1 production, chances are it will stay that way even after the courthouse. They are only effective in cities with 50% or less corruption and even then not much. Concentrate on culture improvements instead and pump out workers in these cities. That's all these far away cities will be good for. my 2 cents. making courthouses more effective would probably be the most effective change in this game. Hopefully it will be addressed in a patch.