Located in the microcentro, the streets may be dirty, but the hotel is an oasis. Our 3rd time in Buenos Aires, and compared to other similar priced hotels, this hotel is one of the better ones. Keep in mind "most" hotels in BA have small elevators, old A/C, and old furnitures, so the Rochester is similar but our room is slightly bigger and everything is functional. The air conditioning unit maybe noisy, which is the only downside of this hotel in my mind.
Overall, a very pleasant stay in Buenos Aires for a few days.