The apartment is extremely well located. The neighbouring streets offer loads of charming restaurants, cafes, pastry shops etc. The neighbourhood is quite central and allows you to walk to many of the sights. The metro is a short 3 minute walk. Really an ideal spot to stay to visit the city.
The apartment itself gives onto an inner courtyard, so it's normally very quiet (although we did have issues on a couple of nights with some of folks staying in other apartments and having parties late into the night). My one reservation is that you can hear the noise of what I assume to be the the metro train passing frequently, but we got used to it pretty quickly.