Thanks for the feedback.
I have a follow up question though.

Where are QML's default role names documented? I couldn't see the list. It would save me a lot of time. EDIT Here they are: link.

@jpnurmi cool :)
did some first tests with QAbstractListModel filled with some Customer* (QObject)
inserted customers, removed customers, changed properties via C++
all correct refreshed in QML ListView

seems I can "port" most of my data model logic / UI from BlackBerry Cascades to Qt 5.6 :)