G0MGM (101km) has spotted my 472kHz WSPR (5mW ERP or less) several times. I think he is a new reporter and very welcome too. Tonight I may go back on the HF and 6m wire antennas (with loading coil) to see how results compare with the earth-electrode "antenna" currently in use.
G8HUH (250km) always seems to copy me. He has a good system on RX. He even copied me on 136kHz WSPR from the old QTH, before I had my cerebellum bleed. I have yet to try 136kHz WSPR from this QTH.