Hi LC, there are a few screenshots in the document which you can download from http://www.sdrplay.com/startHDSDR.html
We hope to add more.
The features implemented in the EXTIO panel can be seen on page 7 of the document. (LNA GR threshold, mixer freq correction, IF amp mode and bandwidth, ADC sample rate etc.)
We look forward to others posting links to video clips of the RSP in operation.
Best regards, Jon