The apartment is fabulous. A great location and while the space is small it is so cleverly designed that we (my wife, 10yo daughter and I) never felt cramped. The kitchen was handy for chilling beers and breakfast and the bed was very comfy (as was the sofa bed).
Unfortunately we didn't meet Antonella but here friends were on hand to help whenever we needed.
The apartment is a short walk from the Colisseum and from there to the old city. There are a number of good restaurants within a shot walk (and a few awful ones too!) Try Hosteria Isidoro and I Clementini - both just down the road and both very good in their own way.
A great place to stay!