DB Transactions with Django 1.6

This is an excerpt (modified to fit a blog post) from the book I'm currently writing on Python web development with Django. Would love to get feedback from people. Is it useful? Does it cover the topic well? Thanks.

j1z0

The part about transaction management and all the layers it goes through, really clarified things for me. Not sure if it's enough to get me to buy your book, but it's a start. :)