Wouldn't repeat!
Although the hosts were kind and tried to be helpful with the problems we encountered in the apartment, I would not repeat the experience!
We arrived at the apartment, which is indeed very nice and central, and it looks like in the pictures.
But, we soon realized that the heating was not working in one room and it was extremely cold. Then, we realized that there was NO HOT WATER in the flat! We contacted the owner, who was indeed very kind and sent someone to the apartment immediately. While that person, whose name I don't remember unfortunately, was still on her way we were using the heating in one room ( the one that was working) and warming up some water in the cooker then the electricity WENT COMPLETELY OFF!
So, it was a completely unlivable apartment, in January, with no heating in all rooms, no hot water and eventually no electricity at all!
Therefore they offered us another apartment, nearby which we accepted because we needed somewhere to stay. The other apartment had heating, hot water and electricity (wow!) but I would have never booked that apartment in the first place. It was quite old and not so nice and what was the most bothering it was that it was not properly cleaned. The sheets were made and you could see that someone prepared the flat for guests, but everything done very superficially, the dishes were not really clean, the floor was quite dirty and especially the bathroom was honestly quite unpleasant, very old and not properly cleaned.
We contacted Airbnb, but unfortunately already quite late, and found out that had we contacted them earlier they could have offered another accomodation.
We also contacted the owner and told her to send someone to clean, which is true she did. So they tried to be kind and helpful, but that apartment was still dirty, old and unpleasant, even after the other cleaning session.
So again, I would have never booked the second apartment and the original apartment, although nice and pretty, was unlivable.
I guess that if you go in summer there you don't have the problem with the heating, maybe the cold water was just a mistake but what I found more concerning was the electricity that went off after just some devices were used in paralel. It's supposed to be an apartment for 6 people, so if 2-3 devices can't be used in the same time because the electricity jumps off then it's not really for 6 people...
Pity, Rome is such a nice city... we nevertheless had a great time there but we would have definitely enjoyed it more if we didn't have all these problems with the accomodation!