This is such a lovely little apartment! The decor and vibe are really nice, and in the sweltering summer we so appreciated the refreshing cross-breeze you can get by having the windows open in the living room and bedroom. The kitchen was well-equipped and Giulia provided ample tea and coffee options. As I recall others noted, the bathroom is veeery narrow (mostly to get past the sink to the toilet) which might be a problem for those with mobility issues. However, it was otherwise fine and very clean. We appreciated having access to a washing machine as well, and there is an elevator in the stairwell which is great for heavy suitcases!
We also really loved the location/neighborhood, and it was by far the best place we stayed in Rome (both in terms of the space and the location). There were many excellent food options, and we went to get gelato from Giolitti every night we were there. Giulia left a map and a list of the best food, drink, markets and other places of note in the neighborhood, which was very helpful. Testaccio is a really nice area with lots of transit connections by bus and tram. We highly recommend it!