ahaha
So, I'm gonna use metric system for y answers
speed: 45km/h (limited)
battery: 22Ah (1kW 48V) (also, they sell an optional 30Ah battery - 1.5kW)
controller: 4kW (3.5kW exactly)
There's no switch to make it street legal. the controller is a specific one. You can't add their Streamport, sadly.
Also, I'm not sure their other controllers support the secondary electric system (for lights, horns, etc..).
So, it can become tricky to even replace the 4kW controller for the 8 or 12, if you loose lights and other street legal features... (but I'm not sure about that, and been told controller upgrade was possible (but it was months before the release, and didn't ask again then because 4kW is enough for me)
I'm 1.85m and 65kgs. (so I still have around 20kgs to spare for the solar charger until reaching bike's carrying weight limit)
Oh, I prefer the tiny wheels

they make the design look more balanced (looks like a mini-supermoto <3 )
autonomy-wise, I do 20kms for 1hour charge. or 30kms for 2h charge (from full battery). Then I get to the flashing blue-red led.
I could probably squeeze another 5 kms after that, who knows.. But I'm trying to manage battery's lifespan as best as I can.