I firmly believe it is the best reference book and it's age has nothing to do with it.

I certainly defend the right of anyone on this board to disagree, but most of the "real world" customers I deal with use the Campiglia book also rather than the TCR.

Just because the TCR may be newer does not automatically mean that it is better for everyone across the spectrum ..... it just means that a 10th is newer than a 9th.