I have tried to recommend the use of XLSTAT to other colleagues, but the cost of licenses and the need to renew the support / update service every year is a major obstacle. I have needed assistance for XLSTAT use several times, and the response of the support team has always been promptly and in a satisfactory way. I think that thanks to the fact that we are already many users of XLSTAT and that it has been several years since its launch -with which the costs of the initial investments have already been amortized-, they could lower the costs of the licenses, in order to encourage users to keep using this useful software, as well as to attract new users to this growing community. Pros: XLSTAT provides basic functionality that is not available in MS EXCEL- most importantly non-parametric tests. Scientists have to understand that the majority of their data is not normally distributed, consequently the tests MS EXCEL contains are not sufficient.