I've used this service a lot over the last 10 years. While the busses, drivers and customer service is quite good, the timetabling leaves a lot to be desired. For instance, while travelling from Belfast to Cork, I saw that the Belfast to Dublin bus arrived at T1 at 17:35, while the bus to Cork departed at 17:30, meaning I had to wait until 19:30 for the next bus. This is not a difficult issue to spot and amend. The lack of connection possibilities and awkward timetables really impacts the service negatively, particularly on routes that seem to be regularly sold out, with no increase in busses. A shame from an otherwise good service.