On my search for great J25 modules, this one made it on my list :).
Would be great if you could add a class that starts with a 2nd level opened.
if you need specific classes or functions, you can ask on my forum.joomlack.fr :)
Once you know your way around, you can create clean and professional looking newsletters for several groups (lists) with your own layout - automatically calling Joomla content.
And all this works with the free Starter edition.
Many thanks to the developers!
I have been using the Menalto Gallery, either with a bridge or in an iframe - but now that I have seen all your features, there is really no need to fiddle around with an external app.