I spent 5 nights in this clean pleasant and quiet apartment which is perfectly located since the majority of beauty sights are in walking distance. The apartment has literally evrerything you might need during your stay. Even two umbrellas. :)
The flat is in fact accessible only by steep stairs which might be considered embarassing for some. But on the other hand this is the perfect physical training for your booty. :) A couple of weeks of going up and down and you'll get the best booty of Madrid. Believe me. :)
Unfortunately, I haven't seen Ulises during my stay since his mother Susana welcomed me. She was very nice. :)
Upon the whole, I do recommend this lovely flat for everyone who's young or at least feels young. This is really the perfect value for money variant. :)