I have already had the opportunity to test several Logitech mice, including G500S. Do not enjoying the son, I headed to this G602. Well took me! Very good battery life (after more than a month, always at maximum battery endurance mode), very good quality compared to the G500S, specifically the texture is softer than the G500S (which I did not like too, being very rough).
So yes, it is a bit heavy on two AA batteries, but nothing prevents you from there to a stack. And then a good mouse pad will slide without the worry.
I really recommend this mouse. Between this and G500S, I do not hesitate one second, the G602 surpasses by far.