This paper highlights some of the issues that have been reported in surveys carried out by the RIOJA (Repository Interface for Overlaid JournalArchives) project (http://www.ucl.ac.uk/ls/rioja). Six hundred and eighty three scientists (17% of 4012 contacted), and representatives from publishing houses and members of editorial boards from peer-reviewed journals in astrophysics and cosmology provided their views regarding the overlay journal model. In general the scientists were disposed favourably towards the overlayjournalmodel.However,theyraisedseveralimplementationissuesthattheywouldconsiderimportant, primarily relating to the quality of the editorial board and of the published papers, the speed and quality of the peer review process, and the long-term archiving of the accepted research material. The traditional copy-editing function remains important to researchers in these disciplines, as is the visibility of research in indexing services. The printed volume is of little interest.