Buying HP ink in a value pack is an economical way to purchase ink. Also getting both black and the other important colors in one package makes it easier and more convenient to purchase ink. It saves a lot of time when ordering because you do not have to order the individual components. Another major advantage of ordering the HP ink cartridges this way is that there is a price savings. If one had to purchase the individual components it would be much more expensive. Convenience and price savings are the most important benefits of purchasing the combo pack.