We really enjoyed our stay at Roberto's place. The check in was really easy and communication was perfect with the person that came to give us the keys, he was very kind to wait for us a bit and gave amazing tips regarding how to get around and where to go. The flat was tiny but well decorated, clean and had AC which is always nice in the summer. Small but functional kitchen, small but functional bathroom and a decent bed. Only issue are super steep flies of stairs and no lift, but that is also to be expected in an older building.
The location is beautiful, walking distance to the most beautiful spots of Rome. Just a bit of a hustle to get to, but no biggie, compared to the big plus that is to live so in the centre!