Small and cosy studio apartment, comfortable for 2 people maximum. In a charming local and safe neighbourhood very close to the train and bus station into the city. Great for the Vatican. A great restaurant, Buona Forchetta, was a pleasant stroll away. Ended up eating there 3 out of the 4 nights. Great affordable food and made to feel very welcome.
Others mention the hot water issue. As long as one doesn't stay a long time in the shower the hot water is more than enough for 2 people to take a decent shower. The water heater then refills and reheats immediately. Not a problem for us at all.
A well equipped kitchen including olive oil, salt/pepper, sugar, tea/coffee and washing machine with detergent were welcome touches.
Thanks Maria, nice to meet you and we'll be in contact next time we're in Rome.