Not useful

Interface is attractive but too limited. Cant perform complex searches (i.e., specify author and abstract + title word and year). This could be overlooked if there was a way to manage PDFs. As is, one can only view PDF files or, if theres a PMC version, you can email it or save to Dropbox. Two stunning omissions are (1) the capability to open PDFs in another app (since theres no library or annotation tools) and (2) you can only export the PMC PDF, not the publishers PDFs. Assuming you have access, you can open the publishers PDF, look at it, then just close the window. A suggestion to the developer, run this past a pubmed user next time.

workmam about Prime: PubMed Journals & Tools