"When it comes to purchasing a keyboard, especially an ergonomic one,
people are looking for comfort. Sure, price and fancy buttons may play a
role, but it all falls back to the feel of the keyboard. This is where
Microsoft Natural keyboards excel. Naturals have always had, as their name
would suggest, a more natural feel over regular keyboards. Microsoft's
latest edition to their Natural line, the Natural Elite 4000, takes
comfort to an entirely new level."