This guy will have to wait for his younger brother.
It was available to buy starting noon local time. I refreshed the page until the buy option became available, but kept getting an error when submitting payment. Waited about half an hour and now it’s sold out. Ni modo I guess.
It’s like trackball mice, it just takes practice to get used to. Next to no one outside logitech makes them either but they are still genuinely good if it’s what you need.