corne keyboard
The Corne keyboard is a split keyboard.
It's hard to get started but it feels good once you get used to it.
Speed after more than a month of use.

My four layers layout
traditional qwerty 
number, function, and arrow keys 
symbol and media keys 
Keyboard light and mouse keys. The mouse keys can't do some accurate
aim, so I still need a mouse on the table. The Corne keyboard is a split
keyboard. 
link
keyboard: https://github.com/foostan/crkbd
typing test: https://www.keybr.com/