This apartment was outstanding and and is centrally located near a lot of the major sites, museums, restaurants and tourist sites. Communication with Isa was easy and extremely helpful. Any questions or concerns we had were had were answered immediately both prior to our trip and during the trip.
The apartment itself was a good size for our group (5 guys) and the 2 bathrooms/showers definitely was a definite plus. its the only apartment on the top floor (6th) and has an absolutely amazing roof deck that wraps around and could easily fit 40 people. The roof deck has a grill and good amount of furniture for lounging. Our group only stayed for one night but afterwards wished we'd stayed for a few more days after staying at this place.
It was really easy to grab taxis and is about a 5-10 minute ride from the Madrid train station (Madrid Atocha). It's about a 5 minute walk to Plaza Mayor and a 10 minute walk to most of the museums
Overall it was a great stay and we'd definitely look to try to stay here again if any of us came back to Madrid.