My wife and I found Valter's to be a great place to stay and explore Rome. Chiara was waiting for us when we arrived and was so helpful throughout our three night stay with suggestions for sightseeing and local restaurants. Chiara even found the perfect tour of the Vatican museum and Sistine Chapel for us; all within a comfortable walk of B&B Overlooking St. Peter's. At Valter's we were less than two blocks from St. Peter's Square and the Vatican.
We like to walk and we found Rome to be a very walkable city, especially from Valter's location. We recommend taking a Segway tour of Rome, 3 hours, during which we saw much we would not otherwise have seen, it's also a fun ride with a nice small group. We also recommend a walk to Trestavera for finding a place for dinner...Trestavera is about a 30 minute walk from Valter's and we are told a favorite area of locals. One nice aspect about walking Rome is that there are busses, the subway which we did not use, and reasonable taxi's to get you around if you get tired. We took the wrong bus from Roma Termini station on our arrival. The right bus number would have dropped us off right in front of the B&B. If arriving at the train station, make sure you ask Vaster which bus number to use. I think you want bus 64.
The room was large enough and the bed comfortable.
The bathroom is small but clean and we were happy that we had our own bath (shower) in our room. We found everything clean and comfortable. The neighborhood is old world, not extravagant but nice and we felt safe in this part of the city. Plenty of restaurants in the neighborhood, snack bar, Pizza Zizza, ice cream, small grocery store, bus stop, taxi stand, nice merchants and restaurateurs really.