The best part of the apartment is the location and the fact that the hotel 55 reception is on the ground floor which means there is always someone managing the building. It is walking distance to the shopping areas which lots of restaurants and eateries nearby. Supermarket is also near.
The only con is that to get to the place from the Rome train station, you need to take a metro (which is an adventure with your luggage and crowd) and walk to the apartment.
There is a flight of stairs from the lift to the apartment and a small flight of stairs within the apartment.
The kitchen is quite small but well stocked.
The furniture used is quite flimsy so be careful when used. The bed is smaller than expected but there are quite a few so they were still sufficient for us.