Recently, I visited the Hong Kong Office of Aegean Airlines and have found it to be very good. The staff were courteous and helpful in getting me the flight bookings/changes for me without any formality. They even told me very useful things about baggage policies. Conveniently located near the airport, my visit was easy indeed. I even joined Aegean Miles+Bonus, which was a nice bonus. I highly recommend it to anyone who's flying with Aegean.