Among the negative points mentioned, one member reported the difficult of understanding the technical issues. In this case, a pilot training could solve this problem. Other comments were related to the frequency of participation; some participants claimed that the majority of the group should have participated from the beginning so the story would have flowed better. In this case the role of the facilitator is critical to encourage participation. Another negative point cited was about the identification of people within the story; they argued that the characters acting on the story should be anonymous, in order to not determine a personal connotation. Besides, the following difficulties were identified: define the details and their relevance to the story; remember the facts to be told; realize a single story among all the events told; and understand the technique.