The apartment is small but has everything you need for a city trip in Rome and is also very nicely furnished. I felt very comfortable in the "small cave". There is air conditioning, a fully equipped kitchen, fridge and a big enough bed for two people.
I usually took the bus to get to the city center, otherwise you can also use the nearby metro station or just walk for about half an hour.
Ask Marco for Restaurant Tipps, I tried his recommendations Roma Vecchio and Pizzeria Ai Marmi and both were fantastic!