As others have noted the hotel has 2 sets of accommodation: the hotel and an annex of apartments around the corner. Both are excellently located. I will post the hotel map (I find all mobile phone maps don't give good overviews).
Annex - we were first located there. One bed apartment with kitchen and living room etc. it was too big for us and frankly I didn't think it was well maintained. The walls were grubby, 2 mirrored wardrobe doors were cracked, and the decor was caught somewhere between 1970s and 1980s renovation. Shower water pressure was shocking. Remember these are OLD buildings. These are ideal for families.
I requested a move to the hotel. This was done promptly and efficiently. Though I think they were puzzled as to why we wanted a smaller room.
Hotel: Room 501 - fantastic. Romantic Italianate room - gilded mirror, wallpapered, satiny bedspread, ornate light fittings etc. toiletries were better. Shower better. Views over the city and rooftops. Balcony. One floor under rooftop terrace (which is special). Exactly what we wanted.
Staff ARE warm and welcoming. Concierge is effusive - we do things on our own but if I wanted someone to organize my activities I would have def used V's service.
My stars reflect annex combo with hotel. Free wi-fi. Def take their advice when it comes to food Buffetta 2 (sp?) was great (round the corner). Taxi fr train station e10 incl tip. 20 mins walk to Domus (must-visit) and Colosseum and Vatican City and Spanish steps and Trevi. 5 mins to Pantheon. Loads shopping nearby and plenty wine/coffee bars.
Highly recommend hotel.