I've been playing with the G3x all afternoon and soon got my head around programming once more, once you understand the numbers it's simple.
I have had a lot of enjoyment recreating my other sounds for the rest of our show, using compression, distortion and modulation, if used sensibly this is a serious piece of kit.
I have discovered ways of improving the echoes and getting them more in line with the real deal, but my Meazzi is at the hospital at the moment undergoing modifications, so I won't be able to compare the Zoom G3x with the real deal until it comes home. I've been using the very similar Zoom MS100-BT and they are very similar to each other, the MS100-BT benefiting from more choice of everything, but the G3x is something I could easily make a living with if I had to.
I originally ditched it because of the noise sometimes coming through whilst scrolling the patches on stage, which doesn't sound good in a concert. That said, by careful setting up and choice of where I put the noisy patches I could make it easier to use with a bit of thought. It was around the time of the H&C being released when I had mine and I sold it when the new machine arrived, I have to admit not my greatest decision.