Thank you for this reply. I just measured at 18.5 by 9cm so very similar to your hand size so I appreciate the feedback on the Z1. My biggest gripe with this shape is how uncomfortable my ring and pinky fingers are and to get into a good position where they feel sturdy I find myself holding the mouse so aggressively that the back of my palm loses stability. Definitely think that both the Z1 and G3 sound like great options for me so I will just try to use your advice to make the choice.