I must admit after the epic 8 volumes on Genesis, I did feel a little let down by this single volume on Deuteronomy ;-)
It must be noted, of course, that the volumes are not chronological, ie Luther wrote the Genesis pages near the end of his life, whereas this volume comes from some 20 or so years earlier - only a few years after his 95 theses. So here we see a younger Luther, and I believe can be argued (as could for all of us), a less developed theology and even more noticeable, a less developed writing style.
For the first several chapters, much more detail is given for particular verses - whereas after that we tend to have just a commentary on that particular chapter.
What really surprised me after the first 8 volumes, was how frequently Allegory is used (and I would argue commended) in the volume - Luther obviously had changed his view about this later in his life. I must admit I struggle a bit with the Allegorical interpretations of the chapters...
Anyway still an enjoyable read - just not as good as Genesis :)