Alberta was kind enough to pick us up from Termini station, and to explain all of the public transport etc. to us on the way to the appartment. She was very accomodating with check-in and departure times as well.
The studio is located a little bit out of the city center, but with convenient tram connections to Termini station, where all of the major bus and metro lines have a stop; travelling to major tourist attractions was no problem at all.
The studio itself is small, but convenient enough for two people. I would recommend this place to other people: it's good value for money.