The main things I thought a reader ought to note when reading this short work are (1) This is still the beginning of work on the will - it was not a major issue in philosophy until Augustine, although bits and pieces may be found, e.g. in Cicero; (2) Augustine's style is quite different from what most people are used to, especially since this is a record of an actual conversation; (3) the problem of evil for Augustine is of a different nature then that promulgated in modern times; (4) the only two people who had a paradigmatically free will were Adam and Eve - everyone else has a less than free will and requires God's grace to will effectively, even when they wish to do good.

It is an interesting work but still represents the early thought of Augustine. Those without a Neoplatonic background will find some of its arguments strange. There is no good introduction to Augustine - in my experience, you have to read a great deal of him in order to understand the typical way he thinks and the concepts he relies upon implicitly. Some Plotinus is probably useful.