Ergonomic input devices recommended by ExtremeTech

I read some reviews at ExtremeTech about keyboards and mice. They recommend the SafeType Keyboard for ergonomic keyboarding. Their recommendations for ergonomic mice are the Zero Tension Mouse and the Quill Mouse (renamed to Aerobic Mouse?). The principle behind all of these devices is vertical positioning of the hand. That seems realistic for mice, but can anyone type with their hand in a vertical alignment?! ExtremeTech claims it's possible after a week or so of practice.