Vacuum Insulation Panels have seen a fast development in the building sector due to their high insulating performance. For this reason several researches were and are performed on this topic. The present work summarizes the research activities carried on Vacuum Insulation Panels by Politecnico di Torino during these last years. In particular, a critical discussion of the most relevant results obtained by the research group are presented. The aim of the paper is to show how the conducted investigations have provided reliable data on VIPs actual performances and general guidelines to assess the VIP thermal properties under actual working conditions.