Pundit

pun·dit

noun\ˈpən-dət\

A person who gives opinions in an authoritative manner usually through the mass media; a critic.

In the movie "Ratatouille" Ego (above) is a pundit who goes to all the restaurants and gives them reviews (usually bad ones.) BUT Remy cooks him up something special and Ego is reminded of his childhood. He loves the plate and gives Remy and his restaurant an amazing review.