First of all the location of the apartment is great- everywhere within minutes by foot. It can be noisy at night with the ambulance and other noises but that's what you get in the city center :-)We had booked the apartment "corso vittorio" but ended up with a different one,"Archi". This is the first time that we did not get the apartment we booked on air b&b. It had similar size and also had two bedrooms so that was ok. Hard to compare if you do not get to see the other one. The living room had no window so it was rather dark. Kitchen is very small but you need to go out in Rome anyways for food. :-)
It would be nice to provide some shampoo in the flat which was none there and we only got 1 roll of toilet paper which was very few. It was fairly clean.
I asked beforehand whether beds are hard or soft - I have back problems and hard is hard for me to sleep on. I was told the mattresses are not hard but they are. But if you have no probs then it's fine.