It's very well written. He takes the lessons of Joyce and Fauklner and them and uses them for a point (Nabokov's :topical trash"). However, perhaps because I have seen the movie multiple times beforehand, I really dislike the ending. I think it doesn't fit with the tone of the book at all and I think that the American editors and Kubrick were both right about cutting it. But aside from that fairly major quibble, I would say this is one of the best novels of the 1960s.