Recently WatchReport has published a Casio G-Shock GW-9100 review. In a short review overall conclusion is: if you are already contented with your solar atomic G-shock, new G-shock Gulfman will don't give big improvement, but if you are new to G-shock, GW-9100 will be a good start.
Read full review and watch photo gallery of GW-9100 you can on WatchReport.