Ok so I have had my crosshair for about 3 years I believe, and was lucky enough to have a later model that was upgradable for Bluetooth(so I can use S1 firmware and app on phone). My question is with my crosshair basically running the same firmware as the S1, is the S1 worth the upgrade or should I just stay with the crosshair? Anyone who has used both and can comment that would be great. Really just wanting to know if mouse movement is better with S1 compared to the crosshair.