thanks for asking. It's hard to compare Consodoc with tbook or jadetex,
they are different things. Consodoc is a framework which unites several
technologies to the whole.

Being a framework, it automates the gory details, but you still need to
write some code. It's the main and I hope the only cons. More
precisely, you need to write:

* an XSLT program to convert XML to LaTeX, and
* (optionally) a LaTeX class file.

On the pros side: Thanks to TeXML, you need only the basics of XSLT to
rewrite XML tags to LaTeX environments. And writing a class file is an
easy task for an experienced LaTeX developer.

For more pros, see the column "Benefits": http://consodoc.com/

Now let's try to compare the tools.

tbook:

* Source XML should be in the gives DTD, but the program for converting
XML to LaTeX already exists.
* Consodoc doesn't restrict the format of the source XML, but you have
to write a conversion program.

jadetex:

* A Jade program should be written by you. The same is for the
conversion program in Consodoc.
* The TeX code, produced by Jade, isn't for a human.
* In Consodoc, the intermediate LaTeX code is actually a first-class
citizen. Consodoc encourages manual tuning of the LaTeX code to produce
beautiful PDFs.

Don't hesitate to ask further questions!