Sentinel-1 GRD Preprocessing Workflow

Hi everybody
Already someone used the Sentinel-1 GRD Preprocessing Workflow create for Federico Filipponi https://doi.org/10.3390/ECRS-3-06201
Was created in order to be used within the Sentinel application platform (SNAP), In’t processing graph in ‘xml’ format. Already some have managed to correct S1 GRD images with this Workflow? they can indicate a user guide for non-experts? thanks in advance. Miguel