When collaborating with clients who had their first glimpses of agile methodology, I always tend to look at their product backlog first. Why is that? Because most of the time, the quality of the backlog is equal to the quality of the team's work. To be honest, the majority of the backlogs prepared by the beginning product owners don't have this "high quality" feature. In most cases, the primary reason for that is lack of acceptance criteria in the user stories.