We stayed for 4 nights at DC collection and it was fantastic!
Marco, the property manager, welcomed us in front of the accommodation. We met him on our arrival day and then we communicated via WhatsApp till our departure. Marco was super helpful (He recommended restaurants, helped us book a taxi to the airport). We had an issue with the hot water in the room but it was solved quickly.
The location was great and super convenient as it is at short walking distance of many main attractions (fontaine of Trevi, Panthéon, Steps of Spagna...). There are lots of restaurants and shops around.
We stayed in room 401 (junior suite): big room and very clean. Nespresso coffee, tea and free drinks in the fridge every day. The bathroom was huge with 2 showers in it! Beds were super comfy.
We had a wonderful time at DC collection and will stay there again for our next trip to Rome!