Service evaluation by user communities - deals with the execution of demonstrators by the user communities. Specifically, we report the evaluation of the first set of onboarded services by the user communities. Thematic services belonging to the Life Science, Climate Science, Digital Cultural Heritage, as well as Computational Physics communities, together with generic and repository services were used as use cases by researchers from all user communities. These cross-border use cases were described and reported in Deliverable 6.3 - User communities’ use cases. The researchers provided brief reports detailing their experience using these services, with an emphasis on the ease of access and usage. In this deliverable, we also discuss briefly the status of generic, thematic, and repository services which are or will be on-boarded to NI4OSEurope.