Thank God for Manohla Dargis!
Here I was trying to decide whether I wanted to watch A Mighty Heart or not, and unable to make up my mind. After all, it's directed by Michael Winterbottom (good) but stars Angelina Jolie (bad). It's bound to be tragic and mournful (good) but in a sentimental, idealistic way (very bad). How to decide, how to decide?
And then Ms. Dargis comes out with a review praising the film and my decision is instantly made. Manohla Dargis liked it - therefore it must be avoided at all costs.
See how important bad reviewers are.