We stayed in this lovely apartment in late Oct 15 with a family of 4. The picture is of the entrance in Piazza Farnese, with the apartment being at the other side of an internal courtyard, facing onto Campo De Fiori.
Michela and Giuseppe were very charming. They met us on arrival at 10pm at the apartment and there were drinks in the fridge and a large bowl of fruit on the kitchen counter. The apartment itself is tastefully decorated with good sized bedrooms and a well-equipped kitchen. The main virtue is the location, and it was lovely to open the shutters each morning to the bustling market on the Campo below. In the evening my wife and I had pre-dinner drinks in one of the many restaurants and bars on the square and the children (13 and 11) came down and joined us after they had had their fix on their iPads (WiFi was very good). The location does make the apartment noisy, with the market in the morning and the square with the street entertainers in the evening, but for a short break it was great to feel at the centre of things. We did find the bed too firm in the bedroom with the ensuite, and Guiseppe went out and brought a mattress topper the same day which made a big difference.
In terms of how we spent our time, we did the usual things and two extras. One was a trip to Ostia Antica (30mins and 1.50 Euros on the train) which has much better preserved Roman remains than Rome itself and was fantastic. The other was a 6hr guided bike tour with electric mountain bikes down the Appian Way, visiting Catacombs, and back through the Aquaduct Park with a stop at a farmhouse for cheese and wine. This was though TopBike Rental and Tours and it was a definite highlight.
Overall we were very pleased with the apartment and had a great stay.