Had a good stay at Mercedes' place. She was very approachable and helpful, e.g. allowing me to drop my luggage off earlier than the proposed check-in time. Communication was easy with her.
As other reviews noted, the room is facing a rather big avenue, so it could be noisy at night.
This is a shared apartment unit and there are 2 other rooms that she rents out, so if you want to meet with other fellow travellers, it's a great place to stay. I had everything I needed in the house, and location was great as well.