Dervys is very friendly and helpful. He will answer all the questions patiently at any time. The room is small but clean and nice. What we love most is the details in the apartment, there are the map and metro stations that designed on the wall, lovely! And some useful information are gathered in the room. But when we use the hairdryer, there will often have some problems with the electricity, and we have to turnoff the air-conditioner while using the machine. Overall it is the place that worth staying. I fully recommend it to the travelers :)