"Ergonomic" keyboards are often just gimmicks. The MS ergo keyboard, for example, keeps one's wrists in a good position and neutral angle, but at the expense of making one stick one's elbows out rather frequently. With a standard keyboard at a little below the height of the elbows when the arms hang straight down from the shoulders, and proper keyboard skills (hands floating over keyboard, not resting on anything), then almost all so-called ergonomic problems just plain go away.