My wife and I just spent a wonderful week in this lovely apartment in Monti.
It was very easy to get everywhere with bus stops and a metro stop very close by (although you can really walk to most places you want to visit), and there are tons of good places to eat nearby.
My wife and I have been to Rome before, so we did not take advantage of Salvatore's offer for advice, but it was really nice to know that we had a personal travel guide just a text message away. Salvatore was an excellent communicator and waited patiently for us to arrive while we navigated the train and metro from the airport.
To answer other reviews about the washer/dryer situation - there is indeed a lovely washing machine in the apartment, but it is tucked away underneath a counter in the kitchen. Drying can be accomplished by hanging clothes on the balcony or swinging by the laundromat around the corner (1 euro for 10 minutes).
There is one flight of stairs, but they are easy to navigate and not overly steep or anything.
The heating works great; a large radiator in the living room and a smaller one in the bedroom (we didn't use either of the air conditioners).
I also thought the "mini bar" was a nice touch. Salvatore has the prices listed of a few drinks he has in a little wine fridge and you can just leave him some cash on your way out if you grab a beer or bottle of wine.
Overall a fantastic stay and I would not hesitate to stay here again if I were in Rome.