G502 is just the perfect mouse for my hand small/medium hand. I've tried a few dusin popular mice over the years and I always come back to the G502.
I don't like mice with ambidextrous design in mind, also the trend of very light mice is not me either. prefer them between 100-140g
So a pure right handed mouse, not to large, a thump rest, not to light weight.
My main mice:
Razer Mamba + Deathadder pre 2014, they both died just after 2 years of usage.
2014 purchased G502 proteus core -> 2017 G502 proteus spectrum (So my GF could take over the proteus core) -> 2020 G903 when i went over to mainly laptop (didn't like it, went back to g502 whenever i didn't need wireless) -> 1 week ago G502 lightspeed
https://i.imgur.com/mYgIXFJ.jpgNow you ask about a mouse of long gaming sessions
I've done 48hours events without sleep with the G502 multiple times. Also for D2R release I played an unhealthy amount of time with it.
Lucky, g502 is what I have now and I find it uncomfortable even with medium hands. My little pinky pushes against the weird edge is has and pushes on the nerve. I found my old steel series sensei better ;(