I am listening to the Audible of the second edition reading along with this version. It is very similar. I can follow Grudem's flow easily and on the parts that are different, see any changes that are worthy of noting. I like the PDF's that go along with the 2 massive audible books (about 80 hrs). Grudem is right up my alley for theological systematics. The new editions are really for people who have not purchased the old ones, and Logos does not offer nominal upgrades worth purchasing, so I am happy with this edition.