My dog flew from Sydney to Zurich via Bangkok with no problems whatsoever. I on the other hand had a very restless 48hrs waiting and tracking the flight. He arrived happy and relaxed and was straight out of his box heading for the car ready for his new adventure.
Granted he is quite a well travelled dog having already made the trip from NZ to Australia but didn't have any issues.
It doesn't matter how many happy stories you hear you will still worry and its only natural. I know when/if we make the return home I will still be a nervous wreck while he's travelling no matter how adaptable I know he is.
Good luck and enjoy being reunited