This is a beautiful apartment, right in the heart of Rome and easy walking distance to just about everything (and very close to bus and tram lines for places like the Vatican or Borghese Gallery). It's light, airy, and pleasant with a well-equipped kitchen, and very comfortable, firm beds. It's not ideal if you have mobility problems, since it's on the 4th floor with no lift access, but it's both central and quiet. We stayed for ten days over Christmas and had a really wonderful time!
Michele is a fantastic host - welcoming, charming, and full of information about the area, and places to visit and eat. He was also very helpful with transport suggestions for our arrival. I cannot recommend the flat highly enough!