Five point someone is basically the narrated story of Chetan bhagats life who himself is tge author of the book. The disadvantage if the book is the narration of the story went in very raw language which a layman could understand but the main problem is the story is written in such a way that "what not can be done in IIT"which itself is the thing that drives youth in the wrong way.
So I just conclude by saying just go through the book it's a one time readable.