Because as a family we hold more to New Covenant Theology,even a Baptist adaptation of The Westminster Shorter Catechism required plenty of additional commentary on my part when working through this with Aspen and Tommy. For example, in the section about the Ten Commandments, we had lots of additional discussion about Sabbath keeping (and why we do not agree with The Westminster Confession in this regard, but what we DO hold to regarding the Sabbath, etc.).
Even so, going through this series has been fantastic. It's incredibly easy to use and every day sparks lots of theological discussion as we analyze each scripture reference used to support the answer to a catechism question. "What part of the answer does this scripture relate to?" "Why do you think they included THIS reference?" "Do you think they proved the answer to the question with these verses?"
We have especially benefitted from learning the hymns in the book. We had a great talk about the anonymously added refrain in Come Ye Sinners. The catechism book contains the original, rich lyrics and the new refrain is pretty doltish, so we skip it!