Our stay at Giulio's apartment was great! The apartment was very clean, well equiped and comfortable for two persons. We haven't really used the kitchen during our stay, but it seems very good and you have enough space to make yourself feel as at home. Giulio was very helpful and the process of check in and check out, as well as finding the apartment was extremely easy and guest friendly. He made sure we feel comforable and welcomed.
As described, the apartment is not located in the city centre, but we've used the very good network of buses, trams and trains which makes your everyday trip to the centre easy and quick. By nearby bus, you can be in the centre in 10-15 minutes, while walking to the Trastevere takes you 20-25 min (and it is hilly). Non the less, this is not a problem for the apartment, just bear it in mind.
Another thing to mention is that it wouldn't be too bad to have some kind of a fan or AC unit in the apartment since during the summer it gets really hot.