The BCGs Genealogy Standards (2014) is a a bit sparse. Examples have been removed from the current edition. This makes Jones' book, Mastering the Genealogical Proof Standard, an essential companion.
Chapters 2 and 4, Fundamental Concepts, and Source Citations, are especially helpful.
If I have any criticism it might be that the examples, overall, are too "textbook." I don't often have need to research probate courts, land title registries, etc. For me, day to day genealogy research is more fundamental and does not involve careful proving (or disproving) evidence.
A second criticism, following from the first, is that the work assumes an idealistic freedom in one's ability to find, choose and gather resources without regard to cost.
The strength of this book lies in the fact that there is a definite need, with all the multi-faceted, combined and federated online sources available these days, to be able to determine and differentiate between primary, secondary, original, and derivative elements.
The BCG Genealogy Standards provides the framework. Shown Mills', Evidence Explained, does a great job of trying to cover the myriad of sources available, offering a consistent guide for creating standardized source citations. Jones' Mastering Genealogical Proof stands in the middle as an invaluable bridge between the two and an essential tool in its own right.