Firstly, the location is great. Near metro, Central Station and walking distance from all main attractions (except maybe Vatican City). The room and ensuite are very small but very clean and modern. Beds are very basic and not very comfortable (foam mattress on slat base).
We stayed in the San Pietro room . I am not sure about the other rooms but in ours, the toilet does not flush properly (told ‘it’s an old building and you just need to keep holding the button down for a few minutes’!). There was also a very unpleasant intermittent smell of sewage in the bathroom. I am not sure where this comes from. You will need a strong stomach if you are in this room. Also, just beware that the ‘Continental Breakfast’ supplied is just a coffee and small pastry from a cafe down the road.