Currently the OE Classroom edition installs completely silently.
There should be at least some feedback as to what is happening as currently people (including myself) think the installer has crashed, while in reality it is still installing/downloading components.
There's also no sign that the installation has finished.
Some customization (e.g. installation paths) should be possible.
With OEDK: Classroom Edition 11.7 there is a progress bar giving feedback on the installation process.
I found the same issues. Should be possible to customize the installation.