Dario and Diana were excellent hosts. The room and apartment were exactly as described. The breakfast, as mentioned by others is great - FRESH orange juice, jams, and some really good espresso. You can tell they care about the guests and they helped out with some planning and recommendations. We also had a late request on our last day and they really took care of us on that. Room was clean, food was good, and hosts were great.
Depending on what is on your agenda, the location is either good or great... We had no problem traveling to Ostia Antica, the Appian Way, and the main sites, but it may take an extra connection here and there (buy the Roma Pass if you're here for a few days and then you don't really worry about hopping on the next bus, tram, etc.).
If we had to do the trip over then we would stay again... Gratzi mille Dario e Diana!