The appartment was clean, bright and cosy. Despite it being located very close to St. Peter's Basilica, the neighborhood is very quiet, and there are is not a lot of traffic around. Also it is easily accessible by train, just about 150 m from Stazione Roma S. Pietro.
A very nice feature of this appartment are 2 bikes which are available to guests. They were not in the very best condition and had to be regularly inflated, but they were free to use so it was alright. Getting to know Rome by bike was a very good experience which I would highly recommend to anyone.
There were some negative issues, but since these issues in the end still worked out more or less, and since in the end we got to leave our bags until the afternoon and were thus able to enjoy more time for visiting Rome, we give a positive recommendation for this place. The location and the bikes and the general niceness of the appartment justify that easily.

Although we liked most of our stay, we will now point out the negatives: There was a plumbing issue in the bathroom, with (fortunately clean) water coming from the toilet flushing. In the kitchen the siphon was leaky and spilled water from the sink. I was told these problems would be taken care of, but that did not happen, so we just put towels on the floor, and in the end managed to repair the siphon in the kitchen ourselves. I was then told that a worker would come to repair the bathroom on the day of our departure, and was offered that we could therefore leave our bags at the appartment until afternoon before leaving to the airport. That sounded very nice, however on that very day's morning Cesare wrote me that new guests would be checking in (so no repairing the bathroom I suppose) and that we would have to check out earlier. We had already made plans for the day so that would have been very inconvenient. In the end Cesare agreed that we could leave the bags and get them later, but we lost time and got stressed unnecessarily. Indeed new guests arrived the moment we were getting our bags.