I can highly recommend Guido's apartment. It is clean, cosy and well located. We could explore most sights of Rome by feet (e.g. 20 minutes walk to the Vatican, 15 minutes walk to the historic city centre). Furthermore, there are some bus stops nearby that can bring you to Colosseum or Termini station.
In the neighbourhood there are a lot of restaurants and bars, however, the apartement itself is very quiet.
Guido himself is a helpful, friendly and easy-to-reach host.
We really enjoyed our stay at Guido's place!