The MTG is retired and the 5600 too. Right now, the only working G-Shocks that I use and enjoy are the Riseman GW9200-1 and the GW6900-1
If I can own a Rolex Submariner I would. I know they are tough too, their homages are tough. Trust me.
G-Shock MTG930DA-8V, G-Shock GW-5600J-1. G-Shock Riseman GW9200-1, G-Shock GW6900-1