While this is still probably the best commentary on the Doctrine and Covenants, this was my least favorite volume. I don't know if the authors or editors just got tired at this point in the production, but this had considerably more sloppy editing than in the previous three volumes. And I felt like the deeply insightful comments were fewer and farther between. That isn't to say that there aren't some terrific gems; they were just more rare. Also, I felt like the commentary for D&C 107 was more eccentric and didn't seem to demonstrate a great understanding of the organization of priesthood quorums in the Church. As always there are some updates that need to be made in light of the Joseph Smith Papers project and other more recent LDS historical research, but that fault is not to be laid on the authors; readers just ought to be aware. I still recommend this series as the best commentary for helping readers gain a deeper understanding of the significance of these revelations of the Lord in their historical context.