Let me give you some advice: dont buy that controller.
Instead, channel your nostalgia and buy the NYXI GameCube controller.
Its better than what Nintendo is offering in every conceivable way.
Additionally, the controller features programmable back paddles, the same as many pro controller options.
The NYXI controllers dont have that issue, point blank.
On top of that, NYXI controllers are easily and cheaply repaired, unlike Nintendos Joy-Con.
Nintendos controller is only usable when the Switch is docked.
It seems like the company is sticking to its guns and making a similarly busted controller for the GameCube.