The stay in the apartment was overall okay.
The apartment is located a bit outside, but from Rome Tiburtina (10 min walk) are regular buses, metros and trains for 1 - 1.50 €. So in total it takes about 30-40 min from the apartment to is center.
Angelo was super nice. He gave us a friendly welcome, showed us the apartment and gave great tips for our sightseeing.
The apartment has 2 other rooms where students live and you share kitchen and bathroom with them. The people were very friendly and there were no problems at all.
Unfortunately, the bathroom and kitchen were dirty. There was only one small towel per person and it was not really clean. There was no toilet paper.
Overall everything totally okay for few days.