The location of Jarin's place is super. It's by the river, and you will be able to see the dancing house.
As he described, you dont even need to take public transportation. 10 mins walk to charles bridge, 15 mins to old town. Or if you need transportation, 1 mins walk to tram station and 5 mins walk to subway station.
Jarin will provide you with all necessary information, and the flat is super clean and spacious.