I have the standard binary version of QtCreator installed through the QtSDK. I have also compiled my own version of Qt5 from the Git repo. I just added a new Qt version in the options and pointed to the qt5 qmake file.

This works and I have managed to quickly port my desktop application too Qt5. I used the fixheaders script to update the header linkages. The only thing that stumped me for 5 minutes was that I still got errors until I remembered QtWidgets is no longer part of core and I had to add it to my pro file.

Apart from that one small hiccup it was quite straight forward.

I imagine that QtCreator does not support the QML2 stuff in the designer yet but I am just getting into QML so not an expert yet.