Cord Blood....say what?

So I was doing some reading, trying to figure out what exactly the deal is with this cord blood saving stuff. This is what I have learned: 

Cord blood stem cells are currently used in the treatment of several life-threatening diseases, and play an important role in the treatment of blood and immune system related genetic diseases, cancers, and blood disorders.Recent studies have shown that cord blood has unique advantages over traditional bone marrow transplantation, particularly in children, and can be life-saving in rare cases where a suitable bone-marrow donor cannot be found. Approximately 50% of patients requiring a bone marrow transplant will not find a suitable donor within a critical period. In certain instances there may be some medical issues around using one's own cord blood cells, as well as availability of cells, which will require treatments done using cells from another donor, with the vast majority being unrelated donors. However, studies have shown that cord blood stem cells can also be used for siblings and other members of your family who have a matching tissue type. Siblings have up to a 75% chance of compatibility, and the cord blood may even be a match for parents (50%) and grandparents.