Their content is unrivalled, although you really need to be aware of their biases. But I don't feel they try to hide them, rather the opposite.
However, with so few global sources of information, like The Economist, that do a good job, aren't we in danger of quite a narrow understanding of what is going on?
I think the Guardian Weekly is an interesting counterpoint, but it isn't avaiable on digital afaik. Are ther other weekly news magazines that reaches the Economists editorial quality?