Federico was waiting in the street in front of the house so I didn't have to worry about finding the house and where to ring the doorbell. Don't worry when you see these stairs approaching from Via Glorioso. You don't have to climb them with your luggage because you simply turn right before the steps and you are almost there. I took the metropolitana from Roma Termini to Piramide and then tram number 3 to Viale Trastevere Ministerio dell'Istruzione. It's in a very central location and you needn't necessarily purchase a weekly bus/metro pass for 25 euros as I did upon arrival and can still decide if you want to go for the Roma Pass including 1-2 museums instead. Actually I walked around without using the public transport on my first day and I saw a lot (Trastevere, Pantheon, Piazza Navona...). I only met Federico when I arrived because his uncle lives in the apartment. You have a nice view from the window and the balcony (green and rather quiet). The host's uncle is very knowledgeable about Roman art and history and suggested places I didn't know were of interest. My Italian isn't good but I had a chance to practise. I only saw the other guests briefly and we shared the bathroom. It's also possible to use the kitchen and the fridge.