Within the FRR-project, user involvement was understood as a core task of researchers, designers and developers in the consortium, urging them strongly to justify their decisions with comments and expectations from potential users. What distinguishes our research structure from most other approaches to user involvement is the fact that, from the very beginning, primary and secondary users as well as representatives from the ethical review team had a say in structuring the research procedures and choosing the appropriate methods. Not only design decisions, but also research decisions were agreed with user representatives. In order to achieve that in an effective manner, we relied on a structure that combined continuous and specialized ways of collaboration with the user. This way of structuring user-driven research developed within the FRR-project constitutes an approach that could be used as a model for similar research projects, especially for those involving vulnerable users.