*Great ergonomics and good quality.
*Digital triggers(way better than the gamecube since the analog triggers only work in melee)
*Joysticks with the octogonal layout (indispensable for smash) and many modern controls do not have it.
*Wired(the best option for tournaments) and also doesn't require the gamecube adaptar(which also gives input delay)
The joystick is bigger than the gamecube, it requires more travel but you can get used to it, not a big issue here.
Sadly, what ruins this controller is that it has random inputs when you flick the joystick as you can see in the video.
I request a replacement, but after five minutes of playing with the new one the random inputs started again.
Now, this is a big issue and I do not think these are rare cases, I notice that random inputs are more consistent when the gamecube adapter is connected. Most of my friends and tournament players use gamecube controllers... so yeah this is not good, not even for practice.
If you have one of these probably it has the same problem, if you play by yourself and don't flick much you won't notice, maybe a random input in one hour but as soon as you connect gamecube controller you will notice.