I’ve been using the Zelotes C-10 (wired for my desktop) and F-17 (wireless for work laptop), when they say vertical, they mean it. Anecdotally, it has helped with my wrist pains. I also wanted the extra buttons on the C-10, so I could map them for gaming (I also use a Razer Tartarus for my left hand for gaming).
Meatwad: “Books are from the Devil and TV is twice as fast”
Frylock: “Twice as fast at what?”
Meatwad: “Information”