I’ve used a Kinesis Advantage 2 for a long time and just upgraded to the new Advantage 360 + new palm rests, which actually achieves all the recommendations in the article. The heels of my palm (not wrists) rest on the large, nice, highly padded fabric palm rests. The 2 keyboard halves can be freely moved around, rotated laterally and tented (with 3 settings, up to 25 degrees) to ensure my hands, wrists, arms and shoulders maintain natural alignment. I also set my keyboard tray to be slightly below my elbow and the keyboards are placed on a negative incline so that my arms extend in a downward slope away from the elbow and my shoulder is not hunched. This setup allows my hands, arms and wrists to feel completely relaxed at all times.

Kinesis is great. The Freestyle with VIP3 fixed my RSI pain and it's so comfortable and durable after so many years.