Does anyone have much experience with this series? I'm interested in buying the Romans volume, but it's also part of a bigger set on sale this month. My interest is for preaching. Has anyone found the Genesis, Daniel and Ephesians volumes useful for preaching. I have a large Logos library and am trying not to buy unnecessary books. I suspect I have these 3 Biblical books pretty well covered, but the $30 extra for 3 commentaries is tempting, but might just be unnecessary.