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.
The point is that about 90+% of people can't use the numpad with their left hand.
And if you really, really want this feature, look for keyboards with detachable or separate numpads. Ages ago, I've seen such a thing where you had four modules that you could arrange in any order: Keypad, cursorpad, numpad, trackball. Today, you can easily get separate USB numpads.