I stayed in this apartment for a couple of weeks in spring / early summer and had an amazing time.
The place is exactly as advertised, clean, decent internet and close to many great restaurants and the major sights like Piazza Navona, the Pantheon and San Pietro.
Be prepared to be entertained by the bustling crowd on Campo de' Fiori all day and night.
Communication with both Jimmy and Nicola before and during the stay were really good, you can always turn to them with questions!
I can highly recommend to stay there and will do so myself during my next visit in Rome!