The title »Responsive JEM« sounded promising, but looking into it, I am a bit disappointed. Doesn't »responsive« mean to adapt the layout to different screen sizes? After installing JEM Responsive I find mobile layout even on 17" desktop screen – which leaves lot of blank space, which better could be used by an ordinary table, instead of listing the information in single column rows.
The screen size seems never to be relevant – only the fact if you fill in the table width field in settings or not. I won't call that responsive, rather "make your computer look like mobile".
NB: On mobile it looks great, of course. So the work for that medium is well done!