It is a really excellent exposition of Romans, with helpful study questions, background material, and all from a Reformed perspective. The material is simple enough for a leader whose group is comprised of new converts, as well as being refreshing for folks whose knowledge of Romans and of basic doctrines of grace is greater. I think any small group study would benefit from this book. As an aside, the book is published by St. Helen's Bishopsgate church, which is based out of London, England. The materials were developed by their own elders for Bible studies conducted in their congregation.