The apartment is really clean and spacious enough for 3 people. Pretty close to several bus stops and metro, so you can reach all the destinations you may need. It is really valuable that coming from the airport you can take the bus from central station that brings you straight to the building across the street from apartment. So, you don't have to walk far with your suitcase searching for the place you've never been before.
Wifi is working surprisingly fast (not all the European countries have that), so it was easy to plan our routes for the next day every evening.
House rules were easy to follow and Massimo's advises about public transport, shops and places to have breakfast were also very helpful.
So, I would totally recommend this place to anyone who wants to see the best of Rome and still stay on a budget.