We spent there 2 nights in order to get to see the best of Rome in a really tight timeline. Location was absolutely fantastic as we arrived to Rome by train at Termini station and connected right away to the local subway network in order to get to Ottaviano. Federici’s is maximum 20 steps from the Ottaviano subway exit, which was super convenient. Not only that, the whole Vatican area is maybe 10 minutes away at the most, walking distance.
As for the owners/hosts, Fabio and his mother were always welcoming, kind and helpful. Breakfast was very good and generous, and perhaps you get to know other guests of this B&B at the dining table (family-style) while eating.
The room was clean, comfortable and bright. The one issue we did experience during our stay was that we didn’t get hot water all the time while showering, and that made our bath time longer which delayed us in our schedule. This is something that I shared with Fabio for improvement/repair. Other than that I would recommend this B&B.