The apartment is just off Via Toledo, very close to the Dante (line 1) and Montesanto (line 2) metro stations, making it easy to get to from all over the city. There is loads of space - I was travelling solo so only needed one of the bedrooms - and a spacious, well appointed kitchen. The WiFi is fast and reliable.
Piero was a fantastic host, keeping in regular contact before and during my stay to make sure everything was OK.
Highly recommended.