Marcia & JCs place was exactly as described. the location was perfect for Centro Historico, and it was very walkable. the hosts communication was prompt. The 24 hour security was very reassuring, and everyone at the front desk was friendly. The apartment was clean and spacious. We especially appreciated the filtered water that was provided, we did not run out of drinking water during our four night stay.
It did not bother us, but you will probably hear street noise late at night as well as upstairs neighbors as they walk about. It wasn't loud enough to disturb our sleep, but it was there.
The apartment is a good value for money, and I would stay here again.