"moving your hand back and forth between the mouse and the keyboard gets very tiring, pull you out of the zone and just takes up precious time " :DDD keyboard

"moving your hand back and forth between the mouse and the keyboard gets very tiring, pull you out of the zone and just takes up precious time " :DDD keyboard is not for fine grained movement, period. it might be useful for handicapped people, but I don't see the relevance in everyday usage.