This flat is great value for money and is in a super location. The street is quaint and quiet, beautiful cobbled roads, loads of nice restaurants and bars, easy walk to all major attractions (even the Borghese gallery is only a 40 minute or so walk). We came here for a mini-honey moon straight after our wedding, and it really was a good choice for this.
Communication with the hosts is excellent and check-in process is very convenient. Hosts also arranged transfer for us to the airport at short notice - and they offer a price which is cheaper than any taxi or uber offer, so definitely take them up on this if you don't want to use the train or buses!
The flat is as advertised in the pictures. The bed is comfy and everything you need for your stay is provided. There are some minor disappointments in that the bathroom is small with a very loud extractor fan, the shower is slight cramped with no bath available - but the bathroom space is still perfectly functional and sufficiently clean so it doesn't detract at all from this being a very good value home.
Overall, 5 stars, I'd stay here again.