“…Sustainability 2018, 10, x FOR PEER REVIEW 11 of 22 analysis and subjective through questionnaires and/or interviews, with the exception of [14,16,45], which report objective evaluations and studies [6,7,16,19,21,24,25,29] report subjective evaluations with qualitative surveys only. Figure 6 summarizes the evaluation methodology employed by the reviewed papers.…”