Being new to Logos 4, I am finding the forums a huge help. Searching the forums has brought a number of resources to my attention of which I was previously unaware.
I remain curious about the Zondervan Bible Background Commentary sets.
Currently, I have Scholar's Library, the IVP Reference Collection, and Beale/Carson -- Commentary on the Use of the OT in the NT (just added due to recommendations on the forums).
My question is to those who own the OT set and/or the NT set: what gap in your library does the set fill? Or, what does the set do better than any other resource in your library?