Annemarie,
As we are now back to Egypt, we would like to thank you for everything you have done to make our stay in Vienna a fantastic and enjoyable one. Your kindness, lovely welcome, advices and assistance, the nice, quiet and clean apartment, … etc. will not let us hesitate to come to the same place if we intend to go to Vienna. I think that saying thank you is not enough but THANK YOU THANK YOU THANK YOU.