Feedback about the 3rd edition of the CPS summer school was collected via paper questionnaires which was given to all attendees during the last day of the school. The feedback survey collected 38 responses out of a total of 41 attendees. This satisfaction survey will allow us to know more about the attendees’ expectations in order to refine the organization of the fourth edition in 2020. Below, we illustrated through some charts the result of the questionnaire.