The location was unbelievably great. The host was friendly, responsive, communicative, and very helpful.
Unfortunately it had a few problems that might not bother others as much as they bothered me:
* The shower ran out of hot water very quickly -- within 5 to 10 minutes. This was a huge problem because it made me take very rushed showers every day to avoid getting hit with cold water.
* The shower lacks a complete glass enclosure (which is somewhat common in Spain) -- but the structure is designed in such a way that every time I showered, water got all over the bathroom floor.
* Unlike in most Madrid homes, this flat lacks persiana blinds (AKA blackout blinds). Instead, it has angled blinds that appeared to be malfunctional; the angle could not be modified.
* On my first morning here, I was awoken around 9AM by the horrible sound of the neighbors jackhammering the wall just behind the bed. My host was helpful, but it still sucked :(
I wouldn't stay here again, but you might love it