This has probably been more beneficial than any of the previous volumes. Once again I am struck by the fact that the issues we faced today have always been issues, and unfortunately we don't make as progress as we think we do. Lloyd Jones quotes Hegel basically saying that the only thing we learn from history is that we DON'T learn from history.
Essays of note include everything written about the Arminians. I wasn't even aware that there were such things as Welsh Calvinistic Methodists, although I may disagree with some of the taxonomy. I also appreciated the examinations of eschatology, and justification. Lloyd-Jones seeks to draw it all together in the end by contrasting the current quest for ecclesiastical unity with the Puritan efforts. I would recommend this volume over the other four if you were looking to read only one.