Diagnostic Clinical Genome and Exome Sequencing

In “Diagnostic Clinical Genome and Exome Sequencing”, Biesecker et al. are critical of the way doctors have been ordering CGES tests in the past and offer new factors for a doctor to consider before ordering the CGES test. They define the basics of CGES testing and suggest various measures that should be taken prior to placing an order for CGES.
Does the process of CGES make sense? Is the synthesis of basics among the various possibilities help or hinder the general understanding of what is happening? How many sources were used to develop this summary of CGES basics?