My friend and I stayed at Guillermo's beautiful apartment for 5 nights during our Madrid visit. Right from the very first contact with Guillermo, he was very responsive (literally instant response).

Our flight arrived much earlier than the check in time of 2pm, however, we've managed to get in touch with Antonio (Guillermo's friend in charge) and he was happy to check us in! (The beginning of our great stay!) Antonio is exactly as other reviews described: warm, friendly and a burst of energy!!

The apartment is exactly as seen in pictures! Clean, bright, airy! Very Scandinavia feel! The bedrooms are spacious and the bed is super comfortable (best sleep ever)! The kitchen is simple and well equipped! The bathroom may feel a bit tight (compared to the North America size), but it Europe, so very practical! Tips: Once you climb up to the final set of stairs (apartment is in the top floor), the unit is on the 'left' ( we made the mistake of walking a full circle, while ducking our heads)!

The neighbourhood is up and coming with a mix of different minority groups. We felt safe throughout our entire stay! It can't be anymore central/convenient! All the major sites were literally walking distance ( minutes away)!! We've only taken the metro once, on our first day! The 24 hr Carrefour supermarket around the corner was a' cherry on top' for our stay!
I would definitely stay at Guillermo's amazing apartment again if I'm ever in Madrid!