Chris’s overall summary is right on. The book starts off great, but Tom Demarco’s “implementation” was a little dry. This seems to be a common pattern for books like this, they present a great argument, tips/suggestions on what to look for, how to identify the problem, but coming up with a clear answer is usually what separates a good read from a great one.
It’s not a long book and if you have a jammed back schedule, it will likely open your eyes. As the title suggests, my favorite line in the book is a quote from Tim Lister, “People under time pressure don’t think faster”.