Pastor Douglas Wilson’s comments & notes on the Westminster Confession (available here) are replete with value. He does so with brevity, good-humor, and precision. This was the primary textbook for my Reformed Systematics course (through New Saint Andrews College), and it was a perfect way to walk through the Westminster Confession step by step, point by point.
Wilson makes it clear where he thinks the Westminster divines put too many eggs in the batter, and makes helpful suggestions for how future theologians might deal with clarifying those points. However, when he takes exception he does so with humility and candor.
For anyone unfamiliar with the Westminster Confession, as well as how important such Confessions are to helping the Church distill the Bible’s teaching into “bullet points”, this would be a very helpful starting point with gaining that familiarity!