Awful. They booked a return flight for me to Thailand. At the time I told them it was highly likely I would change the return date. They told me it would cost 100 pounds and would be no problem. I agreed. Then when the time came to change it I wrote to Barrhead and did not receive a reply for three days. Their reply said it would cost 640 pounds. I went to a local German owned agent in Thailand who advised me that the the airline had been contacted on my behalf and that since there was a delay on the original flight the cost would be free and their charges were 15 pounds to make the change.(!) I wrote back to Barrhead travel who advised me they don't contact the airlines. what? A travel agent that doesn't contact airlines? really? and they also lied about the 100 pounds charge. They could learn a lot from other professional agents in Thailand who bend over backwards to help their customers. If this happens to you get everything in writing, and don't trust them. They are useless and have no idea about customer support and don't care as long as they have your money. AVOID.