What is gained or lost by Harper Lee using Scout's point of view to tell the story?Examples please.

The main adavantage Harper Lee gains from using Scout, a
6-8 year old girl, as a narrator, is that her perspective reamins untainted by society's
prejudices.  Many other people in Maycomb, especially the adults, would not have given
such an unbiased report of what was happening with Tom Robinson.  Also, Scout's
misunderstandings can be a source of humor. 

The main
disadvantage is that, as a young child, Scout doesn't understand a lot of what's going
on around her.  A reader needs to read between the lines often to understand what is
going on.