Firstly, for anybody not sure about staying in Pigneto - do it. Only about 10 minutes from the central station with the tram, it's an awesome little suburb with a very hip vibe. The pedestrian area is lined with dozens of great restaurants, bars and cafes, mostly at very reasonable prices because this area does not seem to have many tourists at all.
Second - the apartment - easy to get to, with an elevator pretty much to the front door. Simply equipped gas kitchen made it easy to prepare our meals (there are 2 small supermarkets nearby), bathroom has a shower and bath, and the bedroom is spacious.
Third - Gerald is an absolutely incredible host. Super friendly, easy-going, polite and just a pleasure to be around. He helped us with loads of local tips and was never too busy for a chat. We felt right at home!
We can't recommend this place enough for a stay in Rome. Thanks Gerald!