Booked on the coach from Londonderry to Belfast International Airport. It was clear there was something wrong with the bus as we left sue to the noise and smell of coolant. The bus eventally broke down with us stranded on a dual carriage. After 15 minutes of not being told what was happening, the driver headed off again only for the bus to break down again. Again the passage of information from the driver was poor. After 45 minutes he told us it might be better getting a taxi so we didn't miss out flights, as he didn't know when a replacement bus would arrive. We booked a taxi as advised. I then got in touch with aircoach to see if they would reimburse us for the taxi. I only recieved a refund for the cost of the ticket which was £15 less than the cost of the taxi. Disappointed that the Aircoach would not refund the difference despite this being the advice of the driver. I also think that there needs to be better communication from the driver as he never really passed on any information of what was happening, or when a replacement bus would arrive. Poor all round.