For some gamers, the compactness and small buttons of the included Joy-Cons make it difficult to maneuver when playing, not to mention the infamous drift problem, whether you have it, or you will have it soon.
GridPad advantages vs other handheld controllers:
Support charging while playing
The changeable right thumbstick to suit your play style
No NFC, no Amiibo support
Why order GridPad?
Save your precious Joycon from drift
Game changer for 2D & 3D platforming, adventure games