Let us be totally clear the ONLY reason we are getting SHARES is because that is what CO uses and as we seen so many times in this merger of equals - almost all of the systems that survive are the CO ones. Now - I've become increasingly concerned about this migration as I've seen and experienced how bad shares is because of its complexity. Iprops or upgrades appear to fool the system and can lead to legs being left on that are then unflown - leading to the remainder of the itinerary being cancelled - UA would be better off stayingmwithnfast air till fast shares is ready