Short review: I am going to have to work on this in sections. I have finished the introduction and the first section on scripture. What is there is good. But I wish there were more historical context. He narrates the historical changes to the theology well, but does not provide much historical context for why the changes were occuring. But that is a common problem in historical theology. I think his range is also too narrow. There is no orthodox discussion and it is clear his is writing for an Evangelical audience. But overall his clear, narrative style will appeal to students and more casual readers and he at least is giving some historical context to the Evangelical world that is usually quite lacking in historical context to their theology.
I have a longer 1100+ word review of the introduction and first section on scripture on my blog at http://bookwi.se/historical-theology/
I have a shorter review based on chapter 11 - The Trinity - http://bookwi.se/allison-trinity/
I will update this review as I continue to work through the book.