WebMD has some straight talk on saving cord blood
http://www.webmd.com/baby/should-i-bank-my-babys-umbilical-cord-blood#tn10338
They say that cord blood banks oversell their services, that cord blood is useful in only a tiny number of cases.
They say that a child with leukemia shouldn’t use her own cord blood cells because they may have the same genetic defect that caused leukemia in the first place.