PPT as an educational tool?

I have yet to use power point presentations in my own class.  I have heard about and seen other teachers use PPT in the primary grades with success.  Mostly, teachers I know have used PPT to display pictures in a story while they read the text or display the entire pages of a book so that students may practice using different types of reading and comprehension strategies.  I have also seen teachers turn classroom pictures into a powerpoint to display at the end of the year.  Parents and students alike enjoy that!