I thought the book was in great condition, and it worked great for our son's class. The lessons are as long or short as they need to be. The material is clear to follow, but not "dumbed down" as it does challenge him.
In our family, Exploring Creation With General Science which is exactly as described "written in a conversational style, is completely self-contained, and Christ centered" has had MORE impact than any course or curriculum. It simply brings all of life into the GOD perspective, and provides a clear, solid and definitive explanation for a Christ-Centered world view. The undertaking of this text book and the test manual is the result of the author's obedience to God to proclaim Truth.