Not the best
Ecosystem -The guidebook is 30% marketing material -The excel is buggy and crashes all the time -The examples utilized in the videos are way simplified and do not represent what to expect during the real test Tower defense -Tower defense vidoes are good. Helps you understand the game and develop some strategy for how to tackle the actual simulation. Overall - Ecosystem guide is terrible. Tower defense has some value. This guide will not allow you to "Breeze" through the game. If you want to pass 100% look elsewhere.