We had a relatively short stay in Rome, but Marzia's apartment was exactly a advertised. It is a lovely, stylish place within walking distance of all the major sites in Rome. I particularly loved the little balcony off the bedroom, but be warned it can be quite noisy at night and in the morning so bring earplugs if you're a light sleeper.😉
Marzia and her children were responsive to our requests and inquiries via email and text. We even had an issue with the taxi driver trying to rip us off and they provided us with the accurate information and waited on our arrival to address the situation. Please be warned, taxi drivers may try to scam you. From the airport flat rate is 48 Euro and they all accept credit card. I would suggest taking the train to Termini though, it's cheaper (14 euro each), convenient and fairly close.
We had a lovely stay at Marzia's apartment and would recommend it to fellow travellers.