Luigi was a great, welcoming host. He was waiting for us at the apartment when we arrived. He gave us amazing tips for great local food and the best gelatto in Rome! He also gave solid instructions about the house, things to do nearby etc.
The apartment was modern, in a great neighborhood, only a five minute walk from Villa Borghese and 20-25 minutes from Trevi Fountain. The are several bus stops within a five minute walk, which will take you pretty much wherever you want to go, including the Vatican, and the closest train station is Spagna, which is a 5-10 minute walk.
The third bedroom has a sofa cum bed, which is like in the photograph but nevertheless makes for an uncomfortable night! The mattress is thin and one can certainly feel the spring and metallic frame pressing against one's back!
The bathroom and living area, including four ACs (one in each room and living room), are great. The kitchen is spacious. It came with cutlery and crockery but without much else, like basic trash bags, sugar, salt-pepper etc.
Overall positive experience but with the apartment cost and 3.5 Euro per person per night tourist fee in Rome, it turned out quite expensive. We wondered if staying in a hotel that charges 70-80 Euro per room per night would have been a better idea.