Javier's place is stylish and compact - all that my friend and I needed for our weeklong stay in Madrid. Located in a well-kept and quiet building. Very convenient location close to major streets and Atocha Station, and within half an hour's walk from all the major sites. Seriously - we didn't take public transportation ONCE and walked everywhere!
Javier was quick to reply to any questions we had and was kind enough to quickly replenish our toilet paper when we had run out in the middle of our stay. Self-check in was super easy thanks to a step-by-step photo guide provided by Javier in advance. Added bonus: it was starting to get chilly outside while we were in Spain, so the heated towel rack in the bathroom was very much appreciated!