Good article but the author concentrated just on great output quality. There is another huge advantage: it is easier and less time consuming to write using Latex. I have used Latex, OpenOffice.org, and Word to write books in the past. Using Latex has the smallest overhead because it is so easy to move chapters and sections around, etc. Another advantage, which I am using now, is that I am writing 2 editions of the same book (using different programming languages for the examples), and using Latex greatly facilitates using common material.