Montserrat did everything to make sure that we have a lovely stay in her apartment. The place itself is unusually spacious and modern. Though the large balcony faces a big street, the place is relatively quiet at night. Of course, with the windows closed, you can't hear a thing. It's also very close to public transportation, being only five minutes away from a metro station, and about 30 minutes away from the main attractions (by foot). I'd highly recommend staying there if you're visiting Madrid.