I heard the sermons from which this volume was made. It is a straightforwardly Westminster Larger Catechism treatment of the TC, and takes confessional viewpoints on 2nd and 4th commandments, if memory serves me correctly.
I did find them useful. I should also note that they are the same sermons as are found in his Exodus commentary. So if you have the Exodus commentary (which I highly recommend), then you already have his complete take on the TC.