Simone was a kind host, mailing us detailed transport info from the airport to the apartment and then staying in touch via WhatsApp answering our questions. San Lorenzo was a good base and therefore value for our money. The 19 tram goes from in front of the apartment block to the Vatican and Villa Borghese gardens. Also a 10 min walk from Manzoni metro stop, although the Colosseum area is very walkable.
Pinsa e Buoi (right next door) and I Fratelli were good places to eat locally, plus a handy small supermarket nearby. The tobacconist next door sells BIT tickets for the tram.
The ground floor studio apartment is an ideal crash pad for a family out sightseeing all day then wanting a couple of hours WiFi time before heading out to eat. Steps in the apartment probably not ideal for very young kids, though. Comfy double bed on the mezzanine level and double sofa bed below. Kitchenette with fridge freezer, kettle and microwave. Decent shower.
San Lorenzo, particularly in front of the apartment is graffiti-ed and littered, but felt a very safe area day and night. Local shopkeepers pleasant and welcoming. Host was happy to have us check out mid afternoon so we could leave our luggage on our last day.
Only negative? Noisy neighbours in the block until very late: music and slamming of the front door, but then we didn't go to Rome for bucolic peace.