Silvia's little room is a great place to stay for my trip to Mexico City for a few days. The private room on the roof was clean, had it's own bathroom, and had an outside entrance. The room does not lock from inside the room though. Silvia was responsive to messages and welcoming, though did not initially answer the door at our scheduled time. Silvia did not allow anyone else into the room, including my sister as she was dropping me off and picking up clothes, which was not stated in the house rules.