Keith Troop posted a great testimony from someone who read Johnson’s The Fatal Flaw while struggling with the question of baptism. He was at a CREC church at the time:
About halfway through the book I was convinced that my new leanings were wrong. After chapters 8 & 9, the Scriptures spoke clearly and I knew that baptizing my children would be a mistake. Your book also helped me to understand the error of Federal Vision. The church we attend has strong Federal Vision leanings. For me, Federal Vision is hard to pin down at times but your book made it clear what the basic errors of their theology were. You addressed this well on pages 112-119.
…What also sealed the deal for me was the fact that the Mosaic covenant is not a covenant of grace. Also, covenantal faithfulness is a covenant of works and not one of grace in its truest sense. A person does not have dual citizenship, a person is either under the law or under grace.