I was on the side being doubled, and when they doubled I thought they were nuts to double this. I was wrong. It's a good double. If they come in hitting they will probably win some gammons, and if they don't hit, there's still a few rolls left before Red scrambles home to safety.
When I took, the guys playing Red thought I was crazy for taking. Turns out it's a small blunder not to double and a monster blunder not to take, so they were more wrong than I was. In order to be a winner in a money game, you don't have to be right as long as your opponents are wronger!