Ekaterina's apartment is ideally located. We were able to visit Rome for a week without having to take any transport.
Trastevere is a really nice area of Rome to stay, since it's not in the touristic centre, but not far from it, with lot of restaurents and bars.
The apartment itself is great, like in the photos, and really clean. The check-in and check-out were really easy, with convenient hours.
The only downside is that it can get quite noisy (mainly due to the paved street).
All in all, we had a great week!