I really like Rotten Tomatoes, but in general I do not even care about the critics score, I always look at the audience score, because that is reflecting the thoughts of an average viewer like me. But, I don't necessarily care about that either, as I have seen several low-score movies that i really liked, and I often end up not liking the high score movies! But, in general I would say that the audience score on Rotten Tomatoes is really useful and normally reflect my own thoughts as well!