I think the module is very useful and the footnotes look very tidy.
But further instructions are required...
For example, where it says: " You can define the appearance of the bubble-help by setting background colour, font colour, font size and the attributes of the reference number (font colour, position and font size)"
Where are you supposed to do that? It took me a few minutes to realise that you are supposed to modify your stylesheets.
An example of the code to obtain the "bubble help" like the one on your demo would be very useful!
Thanks the report.
I updated the description text.