The communicaton and finding the place was very easy thanks to Mario with whom I kept telephone contact before arriving. (he has a very friendly voice :-). His place is very easy to reach from the metro station, and every important downtown place is practically in walking distance. It is clearly seen how much work he invested in his place to make it unique, friendly and clean. At this time of the year (December) the electrical heater gains an extra point. In addition I got many great tips where and what to eat. Thanks again for the flexibility and kindness! :-)