The room is in the back of the house, off of the kitchen -- there are several rooms available for rent to different travelers, sort of like a 3-room hostel. Mine was perfectly pleasant and comfortable (twin bed, nice window, desk, shelves, easy access to a back garden) and in a great location across from a large park and near the two major beaches. I used Limebike, Uber and the buses to get around fairly easily. There are several good breakfast restaurants nearby, and a bus goes directly from the airport to about a block from Petra's space.
I recommend to anyone traveling alone -- it's quite cheap, convenient, in a nice neighborhood and near restaurants. Half hour to the CBD on bike, less by car.