Our first time in Rome and the Nori B&B did not disappoint. Relatively easy access from Termini station, but we would recommend 714 bus to Merulana stop rather than Metro. The bus stop is closer and Metro was always SO crowded it was impossible to carry even a small amount of luggage at any time.
Nori is nicely presented, neat, clean and friendly and in a fantastic location close by the Colosseum and ruins. Access is via stairs with an optional lift (very handy for heavy luggage).
A minor hassle was the shared bathroom amongst 4? guest rooms which made an early start or refreshment after a long day somewhat of a balancing act.
Another minor criticism was lack of all day access to a common area/kitchen to make cup of coffee and share the day with other guests.