Costanza's home was amazing. As a single traveler it was exactly what I needed for my stay. It is not big, but perfect for a few days on your own. The bed is extremely comfortable. There is a cute sitting area that was stocked with a bottle of wine and crackers when I arrived. Costanza greeted me at the elevator (also huge plus!!) and showed me around, including suggestions for places to eat and things to do. The kitchen is small but well stocked, I even cooked up my own dinner one night. There are simple breakfast foods, coffee and tea available. I also made use of the washing machine and drying rack, very intuitive to use unlike many appliances in Italy.
My biggest highlight, though, was the bathroom. I am a bath lover and it's impossible to find baths in Airbnb's in general much less in Europe. Costanza's bathroom had a small bath, not big enough to lie down in but very deep and amazing for a nice hot soak after long days of walking. I missed it so much on the remainder of my trip once I moved on from Rome. The bathroom was spacious for a small apartment and I loved it.
Costanza's home is an easy bus ride from the train station (DON'T FORGET TO GET A TICKET AND VALIDATE IT OR PAY A 54 EURO FINE LIKE ME!!!) and a quick walk from the bus station. It was an easy walk or bus ride anywhere you want in the city. I wish it had been closer to a metro stop but it didn't hold me back at all. Also very close to the Travastere neighborhood with the best restaurants.
100% recommend and will stay here again if and when I return to Rome!