This place was beautiful and clean and within a mile to walk every where we wanted to go. The apartment was cool and you could tell it was thoughtfully updated to be very trendy and functional. There are great travel books about what to see and do in Madrid.
The only two things I would say are:
1) the directions for check out were in Spanish (I understand we are in Spain and it is our fault we cant read the language) but we were uncertain about exact check out directions(though all seemed fine as we never heard anything negative from the hosts)
2) At times the neighborhood seemed "up and coming". I was glad my husband was with me. Nothing negative happened by any means but we had two uncomfortable occasions on the street within a block of the apartment.
Overall I would highly recommend. Very clean and well decorated!!