I really enjoyed staying in the appartement and I would definately come back. It has a perfect location and every landmark in the center of Rome can be reached by foot in less than 30 minutes.
The appartement is clean, cozy and suitable for two persons max. It is situated in a quiet side street, which is perfect because the windows are not soundproof. The bed has a very comfortable mattress, which is very important for me (and my back). The internet connection is very fast and suitable for home office. There are lots of restaurants in the area, so you won't be hungry ;-) It takes some time till hot water arrives in the bathroom, so just wait a little bit. Sometimes, the air conditioning took some time till it started heating, but it is definately going to heat up the appartement.
Corinna was very kind and helpful with a lot of suggestions, the best host imaginable. Thank you very much!