Both JetBlue and WestJet contracted with Sabre Holdings, one of the most widely used airline IT provides, to upgrade their airline reservation systems, The difference between WestJet and JetBlue’s implementation of Sabre’s SabreSonic CSS reservation system illustrates the dangers inherent in any large-scale IT overhaul. It also serves as yet another reminder of how successfully planning for and implementing new technology is just as valuable as the technology itself.