Flavio hosted us really well, showed us around and gave us great instructions on how to get to different parts of the city. The flat was really nice and light, with great private balcony, although not as clean as I would expected (but this is a flat not a hotel). We had all the essentials and flat can easily accommodate 4-5 persons (there were 3 of us). We used our car to get to the center and you can reach any historical part in 15-20 minutes (if you are not experienced driver, do not drive through Rome because streets are hardly marked and really bad, with small cars and motorcycles coming from anywhere). If you want to party, go to Trastevere (thanks Flavio for the tip!). Start with Piazza Trilussa and follow the crowd (mostly students).
WiFi signal was really bad and we could hardly use it. Table football is not functional :(
Overall, I can recommend it :)