Bootstrap 4 is just better than Bootstrap 3 (or Joomla native Bootstrap 2 ) it uses recent methods and even though it is still alpha we use it over 2 years successfully on our own website.
The use of Bootstrap 4 is simple, but to make it work in Joomla! is not "instinctive". As Bootstrap 4 is Alpha the workflow has to be adjusted, that one can easily switch to the latest code basis and not loose all the former work.
There will be an introduction in Bootstrap 4 as well as an introduction to SASS, as Bootstrap 4 relies not anymore on LESS but on SASS. I will show practical examples and ways how to set up production process.
The Session is for developers and designers .... still a technical background is required.