Works Great!
For GTRR (Modular BlueRetro)
Cheaper than the alternative, less shipping costs and works on BOTH the Wii and the GameCube! I've been using it whenever I play those consoles. It's, honestly, pretty good. Didn't notice any significant input delay. The ability to map the controllers as you want is great. And the fact that it starts in pairing mode when powered on avoids extra button presses if I want to use a different bluetooth controller (Tested: Wii U Pro Controller, Switch Pro Controller, PS5's Controller). Solid product!
