I didn't meet Dan personally but his communication was very kind and frequent. He made sure that we found our way (because we had a late check in) and was available on the phone all the time. The apartment was extra-ordinary clean and well equipped with pretty new furnitures and kitchen tools. The location is close to the beautiful Danube shore and 2 walking minutes away from the city centre. We did get everything for a more than fair price in Vienna centre. All thumbs up.