The apartment is 5 min from tram station. 8 tram to Piazza Venezia goes quite often - we never waited more than 15 min and after 20 min you will be at city center. We used buses once to get to Vatican - use app Moovit and you will know where to change the bus. Near the flat there are several shops and cafes, so there is no problem to buy food.
The apartment is comfortable for 3-4 person and fully equipped. We forgot about adapters for European jacks and were glad to find several on the table. Patrizia was really nice to brought us some food as pasta, tomato paste, cookies, etc. There is no conditioner, but it was comfortable at evening with open windows.