I honestly like the idea behind it but I am not a fan of the implementation.

Tried it yesterday and seeing all those buttons and no way to macro it kinda killed it for me. Maybe I will randomly hit some notes when I have time but even just trying to play the notes from others was too much for me. I do play an instrument in real life and I am not tone-deaf or anything but all those buttons are too much. I would have to lay them down the exact way the music is played, to even stand a chance to do it, since I am bad at remembering such stuff. This means that I would have to rearrange the hot bars every single time that I want to play a new song. Thats too much a hassle for me.

A new UI when you click on perform and the possibility to create macros..if those were in it, I would have absolutely loved it.

Still like how some are already playing quite the songs with that but sadly for me this will be quite unused.