I was eating 15 carbs each time. My I:C ration is 1:5, so that's 3 units. My ISF is 20, so basically 15 carbs would raise me 60 points.
Look at worst case scenario: let's say my BG is 100 and i eat 15 carbs and FORGET TO TAKE A SHOT. My BG will end up at 160. Which is still not so bad.
And the margin of error is so much better. There's no huge carb bomb delayed by fat and protein that hits you at 3am. There's no huge dose of insulin to combat a huge meal that then drops you like a rock because you go for a walk or do some exercise.
Course, eating was not very much fun.