Despite being over 600 pages, this book draws you rapidly into the world Wolfe has created and pulls you to the end. It's focus is on the characters rather than the plot to begin with, but they are all so clearly drawn that you can see them clearly and actually want to know what happens to them, even if nothing actually happens.
There are four main characters. Three are male university students - a charismatic alpha-male, a nerd, and an athlete. They intersect via the title character, Charlotte Simmons, a very bright 18 year-old from a small mountain town who wins a scholarship to a top US college. Different plot strands are set in motion and, through Charlotte trying to find her place at university (and in the world), become intertwined over around ten months and have a major impact on all their lives. The most complex character is Charlotte. Everyone else is to a certain extent a charicature, but one of the themes of the book is about how the dynamics of university student society is how it forces students into certain clearly defined categories and act in the way prescribed for these groups. Charlotte is more interesting in that she has no real idea about these different groups to begin with and is pulled in a lot of contradictory directions and her actions and thoughts are often clearly at variance. I'm still puzzling over Charlotte, particularly the ending, and that's a good sign; she is one of the most stimulating characters in literature I have come across in a long while.
The student world is seen through the minds of a wide cast of characters and their thoughts and actions are left to stand by themselves for the reader to make any value judgments about. The author's observations are more concerned with the use of language, in particular the different student "patois". One nice touch is reporting speech straight but breaking off to explain the subtleties of pronunciation.
A certain amount of pages is given over to brief biographical sketches of the characters, showing their upbringing and so on. This is interesting in itself but not strictly necessary as he sketches the characters well the moment the appear. There is also no seeming reason why some characters have these detailed notes and others don't as some with mere walk-on parts get them and other more important characters do not. This is a book written by someone who knows he'll be published and so doesn't have to grab anyone's attention immediately. I think the book actually benefits from that.
Overall, the book feels very realistic. Anyone who has been at university will recognise much in it, and see themselves reflected in the characters - although the US system and experience is very different to that of the UK. Thoroughly enjoyable and with a lot of throught-provoking ideas about self-identity.