Would highly recommend staying at Peppe House. Although we arrived into Rome quite late, Guiliano still offered to pick us up at the train station. He's very friendly and helpful and gave us some great tips on nearby restaurants and pubs. He showed us all we needed to know about the place, then left us alone - although he provided his personal cell phone number in case we needed anything.
A bright and airy, super comfortable space that's well situated. Peppe House is in a residential apartment complex and feels very safe. It's walking distance to the centre of Rome, but close to tram and bus stops if you're not in the walking mood. Guilino even gave us some free bus tickets left over from previous guests.
The apartment is fully stocked with everything you need, including lots of linens and towels. It was hot and sticky during our stay so we made great use of the washing machine before moving on with the rest of our trip. After full days of walking, it was also nice to have air conditioning.
On other legs of our trip, wi-fi connectivity was not great, but had no issue with wi-fi at Peppe House. Works great and so it was so much easier to book train travel and buy musuem tickets online.
A definite "thumbs up".