Win-win-win!!! I honestly can't say what was best about Guillermo's place -- the host, the accommodation, or the location! Guillermo is a great guy. He takes pride in making his apartment a perfect AirBnb experience, and willingly shares his knowledge of local favorite hangouts. It was a pleasure to know him. The apartment itself was renovated by Guillermo, it's impeccable. The flat was warm and quiet, and the common areas are adorned with plants and other soft touches. As for the location, you couldn't be in a more central area, just two minutes' walk from Callao. If you are looking for a shared accommodation in the old part of Madrid, don't hesitate to stay at Guillermo's.