I enjoyed my stay at Silvano`s apartment and would recommend everyone (with tight budget) to choose this place.
The place has everything that an average traveller needs (private bathroom, kitchen that has all amenities, fast wi-fi). There are 3 rooms at apartment sothere is a high chance that you could meet other guests in the kitchen. But it wasn`t a problem for me as everyone was polite and respectful. The apartment is very clean.
I usually used train to reach Vatican (it`s just a 3 minutes ride to St. Pietro train station) and then walked to the places I wanted to visit. Train station Trastevere is within 3-5 minutes walk from the apartment. In the evening I took train from Termini train station (please, check the schedule in advance as from 22-00 there is 1 train per hour) or tram.
There is a small supermarket near the apartment where you can buy food. The area is safe and I wasn`t afraid of returining home late.