It's good for about two weeks to a month, and then you are looking at diminishing returns. The productivity gains come from sharing each others programming tri

It's good for about two weeks to a month, and then you are looking at diminishing returns. The productivity gains come from sharing each others programming tricks. You may learn a different approach to problem solving that you never thought of before. Over time you will learn less and less, to the point where you are just sharing a keyboard.