I'm not a fan of the G502. I used one when the new shape came out a few years back. I threw mine out a while back and moved to the G Pro. I MUCH prefer the G Pro, and it's cheaper anyways.
I don't exactly love the shape of the G502, but the G Pro is super sparse. Just 2 shoulder buttons and a single top button. I have to have more functions than that. If they made one with 4 shoulder buttons that would be pretty cool.