It's better to buy a ReaSnow C1 when you use ReaSnow S1 on a PC.
As you said, you need to switch modes between the MnK and the gamepad. By using ReaSnow C1, it takes a short time to switch, and you can use our app when switching into MnK mode. Without ReaSnow C1, it takes a longer time to switch, and you can't use our app when switching into MnK mode.