Very nice place to stay!
Self check in was easy and straightforward and well explained, room has all the needed facilities and its nice and clean, view from the window of our room was very nice (green tree in the backyard), dark curtains were great for sleep. Location is very good, 15 min walk to colosseum. Room was a bit low on daylight as it looks to the shadowy garden, but at the same time that makes it very quiet (one place in Rome with no traffic!), which was for us very worthy tradeoff.
Only one thing was a bit disruptive to our otherwise great stay: at several times of the day there was loud humming noise (also sometimes early in the morning eg 7am or late in the night eg after 23h), I am not clear where it was coming from (might be AC from the restaurant in the garden, or fan from the neighbouring room?) but this was something that impacted our rest and otherwise great sleep. When the noise wasn't on, it was very nice and quiet, but this was several hours each day.
So, great place to stay and very satisfied with most of the things - just a warning to poor sleepers :D