Probably one of the best places you could find for the price. The location is very close to Vatican, Castele Sant'Angelo and a shuttle bus stop, which can take you from the airport and back. There are some very nice bars and restaurants in the neighborhood, also a carrefour that works up untill 12.
The apartment itself isn't big but probably has everything you might need. There are 2 beds and a sofa, which is suprisingly comfortable to sleep on. The building stays cool at all times(the hottes temperature during my stay was +27) and the blinds shut so little to no sunlight gets in.
The only issue we had was with the boiler. When three people shower one by one in the morning, the last person might not get enough hot water.
Overall I'd recommend this apartment to anyone who is looking for a short-term stay near the old part of the city.