Correct me if I'm wrong, but I was led to believe this style of approach system falls apart somewhat during less than favourable weather, requires a large area of airspace to work, and costs the airlines more money in fuel burn due to the fact they have to be lower and slower earlier, whilst flying an arc. I was under the impression that an Aer Lingus skipper visiting Swanwick in the last 12 months said the point merge at Dublin costs the airline just shy of €1million extra in fuel per year.