Really good service as always but only issue was the driver, which i wanted to point out. On the Belfast 705X express from Belfast - Dublin Airport - Dublin, The driver we encountered was extremely rude to all that i have seen boarding the bus. During my boarding i had to bring on fragile luggage, and i approached the driver with a calm sense to try to explain her my situation. In the moments of 2 mins she assumed the bag was too large and refused to allow me to board the bus with my fragile belongings unless this was stored in the bag compartment below ( this bag fit easily onto the over head compartment with no issues as i have done this on previous trips.). I tried to explain the situation again anoather time but her respond was a childish and non proffessional loop of "Im sorry the bag is too big, im asking you nicely sir." Continuously overpowering what i was trying to explain. I finnaly decided to leave my bag in the bottom compartment but i still believe it was unnecessary as this could have damaged my fragile equipment(thankfully it didnt). As we arrived to our destination, i again questioned the driver why this wasn't allowed but her poorly constructed excuse was "Due to covid restriction". Not only did it not make sense but it made her look rather foolish and damaging the great reputation of aircoach which i have always been satisfied with. The Belfast 705X bus left from Belfast at 6.30pm on Sunday 28th November 2021