About the location:
Location is great, it is really near to a metro station that will take you to the Colloseum in less than 5min. Besides that, that same metro can take you to Termini in less than 10min (if you are planning to move to another city after Rome).
There is a minimarket right besides the apartment, and a lot of restaurants on the zone.
About the room:
Room was comfortable and clean, however during my stay (Oct 14 - Oct 18) it was very hot. We were not able to turn on the AC, because the host told us it was not available once summer finished.
I can understand if for any reason the AC has to be turned off once summer has finished, but that should be clearly specified in the listing. If I would have known that prior to my reservation, I would have chosen another Airbnb.
The host gave us as solution to open the windows, but that make the apartment very noisy, since the street besides it has a lot of traffic. So we were not able to have a good sleep during our stay.
Regarding the shared kitchen:
There is no problem with sharing the kitchen, but there should be rules. On our first 2 days there were shoes all over the place from the people of the other apartment. Besides that the furniture drawers were not clean, so we cleaned everything before using it.
I wanted an Airbnb with good location, a nice place to sleep and a nice place to cook my breakfast, and I only got one of these.