In the past month I took the aircoach to and from Belfast three times. The journey was always comfortable and punctual. However, on one occasion we bough a flexi ticket however because it was the weekend we were unable to call the office to change the time of our departure. When we arrived at the stop the bus driver said we were only allowed on if other people do not show up and there's space. Thankfully there was space on the bus and we got on however it should be clearly stated when buying a flexi pass that there is no option to change bus times on weekends due to closure of the office, or else do not allow the option to buy a flexi pass on weekends.