We had a wonderful stay at the Grey Room and Valeria was very accommodating and helpful. The location is about a 20 minute walk to the Colosseum and 15 minutes to the San Giovanni metro. You’re close to great dining/coffee options as well (definitely check out the restaurant just downstairs - the food was the best we had in Rome). The room itself was very clean and we felt as though we were in a five star hotel. We will definitely stay again when we return!