The apartment was very clean and nicely located off Via Tiburtina, where you can find pretty much anything (supermarkets, shops, bakeries). I would suggest eating breakfast at Favole Di Pane, where the coffee and food is absolutely divine and prices are very cheap! You can find it one block away, on via Tiburtina.
The host was very polite, he waited for us at the entrance of the building when we arrived at midnight, at no extra charge. Communication in English was excellent! This is a huge plus. We found that, generally speaking, Italians know little to no English, which was challenging when we needed information.
The shower head was not working properly and it was really difficult to bathe the baby and ourselves without getting our hair wet. But I believe this was unknown to the guest, who apologized. He said he would get it fixed but only after we left.
A very important note for Rome in general: the buses and taxis are NOT reliable. We had a tremendously difficult time moving around, taxis did not pick up our phone calls and buses did not show up on time. This was the worst aspect of our trip! We wanted lots of energy figuring out how to get to places and the sights are quite far from this flat. You need to change buses and trains to get there and takes about an hour. Taxis are hard to find and cost about 20euros to take you downtown.
Otherwise we were really happy with the cleanliness of the apartment and the quick responses and politeness of the host! I do not think we would visit Rome again because of the difficulty to move around. It is not worth the stress!