There are those who have never learned how to type. These people use a method called hunt n peck. Understandably, these people have a hard time trying to hunt and peck on a normal keyboard. With this keyboard, just hit the ABC key and it will switch to alphabetical order, making it easier to find the key you need.
For others in the house, those who actually learned how to type, just push the button again and you have a normal QWERTY keyboard. This keyboard also has keys that have common IM abbreviations for you super lazy types.