Anti-Ice
The other guys clearly have no idea of what they are talking about!
Working for BA CitiExpress, the number of delays (in addition to the norm) has been almost non existent.
This system cutover over not only saves the company a hell of a lot of cash, but once staff are upto speed (and that wont take long) all passengers booking will find the whole experience of booking so much easier than before.
It will be like booking for any other airline that has been using Amadeus for several years.
Doubters! Go and pick fault with something you may have a slight amount of knowledge on!