It is an amazing quite flat at the heart of the city!
There were 3 of us and it was nice a for a few nights.
It is pretty close to everything you need for discovering Madrid. We had a flight at night and it was delayed (so we arrive even later than expected), but we did not have any problems with check in. Also, we got recommendations about places to visit (museums, bars, restaurants etc) and it was very helpful! I am sure that next time I will choose this flat in Madrid!