i had a G2. same problem with hundreds of people who had G-series from ZOOM (is that we they call them?). After 3 mos of using it, buttons were going crazy.. you cant even bypass the unit for tuning mode anymore! too bad.. i used its modulation/fx for ambient thing and it rocks in that department, i really liked the "STEP" effect, bulok nga lang ang tapakan niya yun lang tkstsktsk