Raffaello is very nice and really helps you with everything since your arrival (in my case, even before I arrived and after I left).
The appartment is 15 min walking from Villa Bonneli train station. Although not very close to the center, Trastevere is just 15 min by bicycle. There are supermarkets and stores close-by.
The appartment is big and comfortable. Even if it lacks a little bit of maintenance, everything works. And if by chance it doesn't, Raffaello will take care of it in no time.
I enjoyed my stay and recommend the appartment.