Critics are terrible. You can't trust them at all. Just because they like a movie doesn't mean it's good. And if they hate something, it may very well be great.
I trust user reviews, especially if there are hundreds or thousands of them. Individual people do a much better job of reviewing movies than critics.
Roger Ebert rocks, but really, the rest of the critics are a dying breed. Newspapers are dying and with them, the critics.
Movies can reach the people today directly. The interloper the critic is a relic.