My experience is that pair programming is extremely efficient. I rewrote the firmware of a product with a college in two weeks that had taken years to do. I t

My experience is that pair programming is extremely efficient. I rewrote the firmware of a product with a college in two weeks that had taken years to do. I think the project would have failed without it. But it’s very tiring, you get rapidly exhausted at that level of concentration, there is a need to take breaks and to recharge by doing simpler task alone between sprints.