We stayed at Roberto's place for 4 nights. First off, the location is great. 5 stars for that. Doesn't have a view, but right next to the Pantheon. We didn't meet Roberto, but his friend Rene checked us in and was very friendly.
The building is very safe. Easy to walk to the main attractions and taxi's available at all times. The house is 2 level; with the kitchen downstairs and the living, bath, and bedroom upstairs. We hardly used the downstairs area except to store our luggage. The spiral staircase makes it almost impossible to carry large luggage upstairs. Compared to the 3 other AirB&B we stayed in Italy, this one had the sparest kitchen.
The upstairs is nicer. Old style bathroom. good wifi and TV. The space is huge. A little basic in design but good. Clean linens. The bed had a bit of a dip in the middle.
The AC wasn't cold enough. Informed Roberto during check out and he said he will check filters immediately (which did look dirty). Also, would have appreciated additional pair of soap (just one tiny bottle of body wash) and towels.