I can try to answer any questions, but it doesn't seem like the 8bitdo Ultimate software is availible for download yet. Im not big into mechanical keyboards, this is actually my first, so I don't have much direct comparison experience to other keyboards.
but the buttons are big and f u n.
What's that other peripheral? Foot pedals?
Nah, they're just giant buttons you smash with your dukes
hmm like the arcade version of Street Fighter I that had sand bag piles of frustration for hit and kick buttons
And to add on, you can connect 4 of these big button controllers - it has four ports on the front of the keyboard for them. Why you would need this - no idea - but you CAN and I love it.
Giant NES themed A and B buttons that come with the keyboard. I want some because they look cool but I'm not in need of a keyboard.