For non-controversial topics, Wikipedia is pretty good.
For the big questions about prime reality (existence and nature of God, age of earth, evolution, etc.), Wikipedia pays lip service with articles discussing the topics; however, in reality it (a) fails to capture the best arguments and instead sets up straw men, and (b) makes assumptions about the "true answer" in many other articles. It has a goal of a neutral point of view, but doesn't come close.
