Has anybody else got "hands-on" experience of this unit?

Having just purchased a Renault, complete with this built-in GPS unit, I'm curious as to what the unit is capable of beside the normal car SatNav functions.

For example, has anyone tried converting GPX files to OV2 (the TT format), and then somehow adding them to the installed map folder?
This would show caches as POI points on the normal road navigation screen when travelling.