Tell me more!
What do you want to know?
I (and my wife) flew Thai First Class BKK-FRA and had an awesome experience at BKK airport. Treated like king and queen from the moment we left our taxi at the airport. Someone took care of our luggage, got personal check-in, escort through security, escort to the lounge, set up appointment for the massage in the spa, had order for food in our private room in the lounge. Nice cup of tea after massage... then escort to the airplane.
They come and get you when it is time to board the plane. You walk on the board and they take your carry-ons and stow them for you, escort you to your seat, offer you pre-departure drinks, doors are closing as soon as the last FC passenger steps through the door and we are ready to go (they board business and economy first and FC last).
Food options are awesome as well
I used Star Alliance miles to fly First Class (me and my wife). CLT-JFK (US Airways), JFK-ICN (Asiana), ICN-PEK (Air China), PEK-BKK (Thai), BKK-HKT (Thai), HKT-BKK (Thai), BKK-FRA (Thai), FRA-MUC (Lufthansa), MUC-CLT (Lufthansa). We had week in PEK and week in HKT. Did Similan Islands and Phi Phi Islands diving while in HKT.