Southwest's boarding procedure is an interesting one.
Rather than boarding in large groups at random, Southwest assigns specific boarding numbers to all passengers ranging from A1-60, B1-60, and C1-60 to board the planes.
This is done at check-in, and those who check-in 24 hours in advance vie to get a better boarding position than those who check in later in the day.
But there is an option for those who do not want the dreaded C boarding class to appear on their ticket- Southwest Early Bird Check In.
I tried this one out on a recent flight, and thought it would be appropriate to share when this one is worth it and the other cases when it really isn't.