We selected Mauricio's apartment specifically for the good reviews and the emphasis on it being quiet because we wanted to get a good night's sleep during the busy Carnaval days.
The apartment didn't compare to the pictures online and definitely needed some maintenance (wallpaper peeling off, plugs coming out of the wall).
Regarding the noise level, the window and door didn't seal completely and we were able to hear everything. Some noises were definitely Carnaval related but there was also a very noisy generator that kept us up at night.