This was a good one by Dr. Vail. I appreciate the comprehensive look at these important topics. He spent a lot of time laying the groundwork, but the last few chapters really paid for all of that work.
The justification chapter does a lot of heavy lifting in regards to some terms and concepts present within an Ordo Salutis. The next chapter, which is a pretty quick look at all of the "leftover" atonement/salvation words and concepts is brilliant.
I particularly resonated with the "Seed" section, using John to show that the death of Jesus turned death into a two-way street. (I'm sure I'm poorly paraphrasing Vail's argument here)
Finally, he waits until the very end to tackle substitution and specifically penal substitution, but does so with grace. I am biased because of my predisposition against PSA, but Vail does a great job of showing why it is lacking as a fully-functional model/theory of atonement.
All in all, I enjoyed this final volume in the Wesleyan Theology Series.