We can't second guess the PIC or his FO on their decision making process. I'm sure they were keeping track of their rate of fuel burn and loss of fuel at every check point as well as in contact with their Mx control. I am sure that with his experience and if the low fuel situation became an emergency he would have set down in Alliance, Love, or Fort Worth. The crew did an OK job... at then end of the day, nobody went to the hospital. Let's give the captain and yes his FO some credit.