I love my 4PM but also found the center knob a bit awkward. Not a deal breaker just a little quirky. The perks and value of the transmitter easily outweighs this issue. And as you point out it can be trained around.
lol its super simple and easy. just think of it as a directional pad on a video game controller, if you dont know what that is google it. if you use it like a joystick your gonna have a bad time. instead just push on the edge of the stick.
