"To understand the great weaknesses in Paolini’s work, it’s first necessary to understand the small ones. Let’s start with the minor sins before looking at their heavier brethren. As I alluded to above, there isn’t much to enjoy in this novel; not at a technical, literary, or philosophical level. While some of the linguistic errors might be resolved with a good editor, many of the other errors are stylistic or structural and are much more intractable. Paolini devotes pages to unimportant minutiae, drowning the narrative in lengthy and ponderous description. At one point he spends twenty-two pages to describe the forging of his sword from space metal. Twenty-two pages!"
You can find the rest of Rob's excellent review here. Rob has also written quite a scholarly article about how the character Eragon, far from being a hero, is actually a sociopath:
"Eragon has little mercy or understanding for anyone around him (either friend or foe). This trend only gets worse as the novel progresses. Steadily, we proceed from actions which are merely foolish to those which are profoundly disturbing. Consider how Eragon acts in the first few hundred pages of Brisingr. In the opening chapters, Eragon commits genocide. He later circumvents justice in order to condemn and abandon a man in the desert. Last, he kills a child in cold blood while the boy is begging for mercy. In this essay, we will look at these three scenarios in detail and show that Eragon has lost his way, his conscience and his soul."
Chew on that, Paolini! ;)