Look at the manual to see its features and way of working. Then decide to purchase it or not for a small amount (it is also including presets from the manual).
https://www.sunnysynths.com/moog-grandmother
The panel is only a patch loader/saver on computer as the Moog Grandmother does not support the load/save of programs by sysex dump exchange. It supports however the manipulation of some program parameters by Midi CC messages but far from all parameters are covered (only the ones described on page 43 of the Grandmother manual).
Features:
Moog Grandmother patch saver/loader for PC and Mac
Button to switch the layout between the colored and the Dark editions
Interface with same look as actual synthesizer
Bidirectional communication with actual Grandmother synthesizer for all parameters supporting CC# Midi communication (see p43 of the manual)
Top row of support “screens” with old look
Visual feedback by using “LED” ring buttons and indication of the parameter value
Envelope graph handled by mouse or classical ADSR rotary encoders
Selection of the Grandmother OS with impact on the panel controls
Global parameters management (receive all then individual update – still under testing and in discussion with Moog)
Load / Save programs from individual .syx files
Automatic change of all CC# parameters on actual synthesizer at program load
Easy program renaming
Display and export of program parameters as text file
Ability to describe 9 input/output colored patch cables with different sources/destinations
Programs have a name, author, save date and description. They can be associated to a category
Browser of the files on the disk
Patch sheet tab with patch sheet for Grandmother and other gear
Patch cables (9 colors)
Author and save date
External synths
Display of current precise parameter value when clicking on rotary encoders
Zoom remaining till next session
Automatic reading of wav files associated to a patch (in file browser)
Manual/Automatic reading of any wav file (in file browser)
Standalone versions for PC and Mac
VST versions for PC (32 and 64 bits)
VST and AU versions for Mac
Extras Midi CC controller number for the buttons without a Moog assigned number so you can adjust them from a hardware controller (still no impact on the synth of course and unfortunately).