Ms. Hobar is a fantastic writer, and I do love this curriculum for many reasons. The coverage is good. The timeline is well spaced out over the four volumes, and the text is written in an engaging manner for all ages.
However.. I do like to see illustrations. It seems to me as though illustrations and other engaging materials are missing from the text. In fact, there are no illustrations whatsoever aside from a few secondary scene cliparts (and the maps in the back of the book). What I mean is that there are enough of them to make it so the pages are not COMPLETELY lacking in pictures or illustrations of what we have read but enough so that it seems like there are "blanks" purposefully placed so that parents would have to purchase the coloring pages and the timeline figures etc., etc. in order to get the full picture. For example, in Lesson 7 we read about the Sumerians where cuneiform is explained in detail. The activity in this lesson is to make our own cuneiform tablet complete with instructions but no illustration to show us what it even looked like.
I've put off implementing our history curriculum until the fall because this curriculum is not complete. The extras are simply not optional and so the book needs to have more specific instructions for the parent as to how and when to implement it all together, like Tapestry of Grace has done.