Even the GC Controller is way better than the Wii U Pro in my opinion. Unfortunately it has some buttons missing (ZL and minus) and the D-Pad sucks. It's the best controller for MK8, Sm4sh and Nintendont (obviously) though.well i got wiiu pro so im already very satisfied with my controllers.
But now that I had the chance to put my hands on a friend's Switch Pro Controller I really fell in love with it.
It's really on par with the XBox One S Controller and the fact that I can use it on PC, Android and Wii U (thanks to Maschell's fantastic homebrew) makes me buy it next month although I don't own a Switch.
(Being able to have my own Switch Controller when I visit Switch owning friends might be another reason ...)
Only big downside is the fact that it still (for f*ck's sake, Nintendo!) has those goddamn digital L/R buttons instead of analog ones. Would have been great to use it for racing games on PC as well but I guess I can live with it.
My dream setup is a GC Adapter with 4 GC Controllers (for friend evenings) and a Switch Pro Controller for myself.
If Maschell manages to get HID to VPAD running in RetroArch too it would be even better for me. =)
Nevertheless the Wii U Pro Controller is a good one, don't get me wrong on that.