Paddle shifters are designed to make faster gear switch not removing your hands from steering wheel which is really handy on track. I've note this while driving on Moscow Raceway and my A/T gearbox wanted to drop the gear each turn.
Works Bell Column Shifter Kit
HNP F1 Paddle shifter kit
Universal wireless paddle shifter kit which sticks to the steering wheel.
OEM Nissan Paddle shifters
Nissan Stagea and Nissan Skyline was equipped with them.