A separate numeric keypad adds functionality to a keyboard without a numeric keypad and also allows you to place the keypad wherever it is most comfortable for you. Laptops rarely have a numeric keypad due to limited space, so this is a great solution for laptop users who find themselves entering a lot of numbers. You can enter numbers much more quickly and comfortably than using the numbers above the regular keyboard space.
I received the chairs today and they are perfect. Thank you for your personal attention to my shipping snafu. In this day and age of the internet and push button instant gratification, we sometimes forget that the real value is not in a price that is 1% better. It's in the value added by empathetic people how really try to help. Maybe you should create a company tag line like "Real humans providing great human solutions."