I really enjoy the book, and think that the personal elements of the storytelling are a big part of what makes it engaging and fun. The book has some serious moments, and some droning storytelling that doesn't seem to have as much of a point as it could. It's hard to say how some of the stories, which seem fairly redundant in expressing opulent or hierarchal elements of the corporate culture, are supposed to work in the book, and so it is easy to wonder if the editorial judgment was really there. This is, again, a standard feature of first works.
That said, I think that this is a worthwhile read, for those who are interested in finance or even simply those who are interested in the sort of good stories that Lewis is famous for telling. Engaging and fun, I find Lewis entertaining and thoughtful, and the fact that his personality is carried across so heavily in this book makes it a really fun read.