Had with them the worst experience of my life with a bus company. The timetable and frequency posted on their website differ completely from the reality. They say in some timeframes the frequency is 15 mins but it is never less than 30 mins. In addition, the bus arrives at random times, do not expect it to arrive at the times said on the web. In addition, they have no live tracking, so you better be lucky. In addition, if you are trying to get to the airport and you are at one of the last stops (Dublin city centre), good luck getting a seat. The day we tried we saw 1 full coach and another 2 that had very few seats left. People fought to get on the bus, being the vast majority unable to take it. Most people ended up having to take a taxi to not lose their planes.