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.