Location: the apartment is approximately 5 - 10 minutes walk to a few subway lines, which was helpful. More importantly, the listing is located in the Malasaña district with many hip bars and clothing stores. Regardless, we did not have any trouble sleeping at all!
Listing: this is a beautiful space that was perfect for our group of 5 with all the amenities we were looking for. The balcony overlooks a small lively park (again, surprisingly not loud). The central A/C is a godsend for Madrid summer. Would highly recommend this location if you're a group of 4+ people