Next week I will be traveling from Limerick to Dublin for dialysis and then returning to Galway in the evening to meet up with my group. It seems as if using the bus is just as good as the train, time wise etc.. with a lower cost. My departure time from Dublin is not fixed so I don't exactly know when I'd be ready to depart on the train or bus. Is there any reason to pick say the train over the bus? (I'm not traveling over the strike on the 1st and 2nd...) Also other than receiving a small discount on the bus is there any reason to book in advance? From what I can tell there are not timed tickets on the bus - www.buseireann.ie . (I think if I go with the train I would save more money prebooking.) Also it seems like Three Ireland has very good prices for SIM cards with unlimited data for €20. Any reason to go with another company?