It's superb.
It gets extra bonus points for including the original WCF text as a variant (it's using the American version but accounts for the changed language) and for including the Augsburg Confession. I also appreciate the brief historical notes on each document.
For someone in the Reformed world, you get the Creeds + Chalcedon, the two most essential doctrinal statements of the other two main branches of the Reformation in the 39 Articles and Augsburg Confession, and you get the full slate of Westminster/3 Forms of Unity, and the London Baptist Confession. On top of that, it's well bound, has excellent typesetting and formatting, and isn't the size and weight of a landscape paver.