The place is very central in Madrid, so the price we paid was about right. Its on the ground floor and set back from the street (through a walkway and courtyard toward the middle of the block). This makes it extremely quiet, and we couldn't hear anything at all, even on weekends. This also means that the natural light is a bit lacking, and we didn't feel very connected to the neighborhood until we went outside. The utter quiet coupled with very comfortable bedding meant that we slept very well - perhaps too well.
The cleanliness was A+, it had fast and reliable wifi, lots of storage space, a comfy couch, good heating, and a reasonable bathroom. The TV is in a bit of an odd location, albeit in the most logical place for it.
The kitchen is strangely lacking a microwave and is stocked a bit lightly with some strange choices (oven tray but no tongs/rocksalt but no grinder etc). It's managed by a company, not the owner, and lacks a few personal touches. Great for short/mid stays.