A resource that contains everything you need and want for improving your climbing (well maybe except those perfect conditions...)
Easy to comprehend due to clear writing that also builds on concepts, linking theory and practice together into training guidance. There is consistency pertaining to details from big to small which smooth the process of managing one's own training and decision making when it comes to workouts, periodization, etc.
Eric knows, and has always written as such, the nuances of training with a ton of personal experience as well as working with other athletes. This resource consistently approaches the practice of training as a cluster of effects rather than the myopic and ineffective 'go hard all the time' approach. With some mental effort and willingness to try the author's approach, the user will enhance their understanding, and ultimately implementation, of climbing training because the clear ties Eric makes between the workouts' goal and the nuts and bolts of what to do. The book is also easily referenced for the quick look-up usage.
Sections on the 'soft skills' (nutrition, mental approach, behavior outside of training, etc) are neither fluffy nor promote a robotic life. The emphasis on simplification and reducing distraction is potent and probably yield gains comparable to 6weeks of physical training.