For a few weeks now, I've been using my Logitech G500s at work, and my G502 Proteus at home. As much as the G502 is fine, it really doesn't hold a candle to my G500s. The layout of buttons isn't as good, the shape isn't as perfect, and the buttons aren't as easy to differentiate by touch alone. I don't regret the purchase necessarily, I'm just lamenting the fact that the G500s was absolutely perfect for me