I ordered the longer tether cable with a new keyboard, yet for some reason, though C9 shipped the keyboard via UPS, they shipped the cable via USPS. After 19x days, the cable has yet to arrive. I cannot review that which I do not have, but I can review the company's practice of shipping the cable separately when it could have been placed in the keyboard's carton.
The extra length allows me to have my wrist shoulder length apart this allows a laptop to easily sit between the keyboard halves.
It’s insane how abusive other keyboards are. You’re wasting your life if you don’t have this keyboard. There simply is no comparison.