It's short and reasonably readable so you can bomb through it quite quickly. If you haven't done anything to do with CI and don't know what it is or what it can do then it's a reasonable introduction. If you've done much then it's a bit basic and shallow. From our point of view it is a little naive in that there's an implicit assumption of being early in the project lifecycle, with no discussion on fitting this onto existing projects either from the point of view of technical challenges applying tests or political challenges persuading people it's worthwhile. It is also rather naively optimistic about the benefits of static analysis and code metrics (doesn't seem to believe there's such a thing as a false positive).