Mario was a great host. He welcomed us and showed the apartment + explained where everything is and how it works. He was easy to communicate with, extremely responsive and helpful - replied to every query within minutes, and also arranged transfer to the airport for us.
The apartment is really good located. Everything you need is in the area - restaurants, shops, bus stops, etc. It is easy to get to all the main attractions by foot (within 30 min you can get to Colosseum, Trevi Fountain, Vatican, etc.) or by public transport. It had all the equipment that we needed + very comfortable bed with good mattress. We were staying there during New Years Eve and weren't disturbed by the noise coming from the busy streets or other apartments - a peaceful place where you can rest and relax after exploring Rome :)