Antonello's apartment is in an area located perfectly for getting around Roma. it's around a 5/10 minute walk to Roma Termini which is one of the key transport hubs for both metro and train. We were able to get to Vatican City in under 30 minutes by metro, the colasseum by walking in 25 minutes.
The area around Termini is not the nicest of areas of Rome but once you head towards the centre more you're very quickly in the heart of the city and surrounded by culture and history.
Restaurants around the apartment again leave a little to be desired but you can easily walk to some exceptional places.
Antonello as a host is wonderful. Very responsive and helps with any isses which arose in an efficient manner.
The apartment itself is ideal for 2 people, 4 may be a bit more cosy but if they were young children it would be fine. For a couple it is ideal and feels secure inside the building.
Would fully recommend for such a reasonable price. We stayed for a whole week and never found the apartment an issue in our stay other than occasionally having to walk to get food in the evening!