Everything was beautifully smooth. I am--as usual--frustrated with the web developers. SOme of the menu items are not available (Plan your journey; Help). In particular, I have a question which has no answer here. I bought a round trip ticket upon arrival at the airport. On the ticket it says "Return Journey is on a Space Available Basis Only". Uh-oh! What if the 9:15 bus, which brings us to the airport from O'Connell street in good time, is booked up? So we will take the 8:45 bus just in case, and be first on line for the 9:15 bus. Or will we? Can we make a reservation on one of the buses? There's no way to do this on the website, but neither is there a statement that one cannot do that. What if both buses are reserved by more savvy people and booked up? We will lose our flight. WHat's going on?