Very disappointed with the Drupal 8 version. It's full of bugs :

- No preloader before the slider is set up

- All layers (md-objects) are displayed in a pile at the top left corner of the container, before the slider starts. This looks dirty

- We can see all the background slide images being loaded before the slider starts. This looks very dirty too

- Fade animation for the layers don't work (no error thrown in console)

- Bug with selections of layers. From time to time when we select one layer, the previous layer stays selected

- No HTML input possible

There are plenty of other slider components that are free to use and working better than this one.

The Drupal 8 version was released months ago and is not maintained. (No update since).

Many of FREE modules on Drupal's community are more often updated than this one.