Guillermo's place is fantastically situated in the heart of Madrid. We arrived quite late due to our flight being delayed and then customs (oof, customs!), but the Guillermo's on-site assistants were extremely patient and communicative. Once we arrived, we wandered a short two blocks and easily found a fantastic restaurant (La Musa Latina), and then what seemed like hundreds of other great cafes and bars within a few blocks of the flat. Yet, when we returned to the flat, it was very quiet and secure. We slept well, ready for more adventures in Madrid.
I really can't emphasize enough how good this location is. We had a great time here.