The apartment is in a great location - convenient for all historic/cultural spots like the Colloseum, Roman Forum, the Pantheon and Galleries, Fontana di Trevi and Basilicas but also Termini station which is the main hub that will connect you to the airport and the rest of the country. There are busses running to the airports every half an hour for EUR 7. Station has luggage hold depo for EUR 6 per item (big or small, so combine them if you don't want to be charged separately for a shopping bag you want to leave behind to explore the city before you embark on the train and say good-bye). I didn't use public transport or taxis at all while in Rome, walked everywhere; to the Vatican from the apartment was just over half an hour and I had my minions with me. Some decent eateries serving authentic food. Check out Antico Forno Serpenti down the road from Ciancaleoni for freshly baked pastries and great pizza. Trattoria al Tettarello had a nice selection of wine and fresh pastas/pizzas and gets full very quickly.
Check in process was easy. Massimo the host communicated very well and explained all the necessary processes including the need to provide passport copies to register with local police department before arrival. We were a bit cold the first night and he kindly dropped extra blankets the next morning.
The apartment is a bit dated with decor and finish but it's well spacious for big families - 3 double bedrooms, a single one, 2 bathrooms/toilets. Kitchen with all the essentials and a large terrace balcony which we didn't use because of the weather but would be great in the summer. There is noise in the neighbourhood at night but hey it's Rome and people party, pack earplugs.
Overall good experience, would recommend and stay again.
Thanks for hosting us Massimo.