I cook for the double amount of time than what it says. It probably one of the esiest digested food to be found, even easier than white rice, if prepared carefully.
I definitely have more energy for working out and gaining weight from the beans.
For a while I was eating potatoes and vegetables but after a while that wasn't really giving me the energy I was looking for. The power when lifting is what measures if it's healthy and right for you.
So I would recommend beans before anything else, no other foods really work this good.