Monica's sister was there to welcome us and show us round the apartment and told us everything we needed to know about how things worked and gave us good advice for the questions we had. We knew that she was easily contacted if we had any problems, which we didn't. The apartment was perfect for our stay (two adults and two sons, 16 and 19).
The roof terrace was absolutely the best bit, especially as the weekend we stayed the weather was beautiful and hot and most of the time in the apartment we spent up there, including late into the night. The location couldn't have been better; we could walk everywhere - the Colosseum, Forum etc, the Pantheon, St Peter's Square - we only used the bus to and from the bus terminal.
In response to previous feedback I would say that yes, the bathroom is tiny but also warm and flooded with sunshine/daylight. The bedlinen may be a lttle old but it's good quality; lovely thick cotton and blankets. It's a little noisy at night but being right in the centre of a city, in an interesting area, that's expected, and we all slept absolutely fine (all that walking!).
When we arrived we couldn't quite find the apartment but the owner of the lovelyrestaurant on the corner offered help and directed us immediately, we ate there twice and would definitely recommend it. I'd also recommend that guests type the wi-fi code onto something that can be copied and pasted on the device they're using; it's really long and TINY and the connection slipped quite a few times.
We had an absolutely amazing holiday there and I'd totally recommend the apartment; it's quirky and homely and I wish I was sitting on the roof terrace now, sipping a cold beer and listening to the church bells filling the sky.