Well, it depends on the reviewer. If I've agreed in the past, then I'll probably agree with them again. I actually watch movies based on trailers. And many bad movies have good trailers, sadly. I Heart Huckabees was alright, but the trailer made me think, "Hey! A Comedy Movie!" It was not. Other movies have had bad trailers, but end up as good movies. And all reviews of Constantine were negative. That was a good movie!