First, Marco is a great host - he was in contact with us constantly, gave us helpful tips and overall made our stay easy.
The apartment is fine, enough space for a couple and have all the amenities we needed. All was great except a bad odor if we didn't left the window open for ventilation.
The highlight was the neighborhood - you want to stay at Trastevere! Small pedestrian zones with great pizza on their sides, the best food around - real Italian without the fear of tourist traps, in the evenings we set at little wine bar that are open until late.
Great experience overall, highly recommend.