We were met by Javier's sister, Beatriz late in the night to hand over the keys to the apartment. They were very accommodating regarding the late check-in. Beatriz was very helpful with recommendations and was very pleasant to talk to.
The table had a bunch of brochures and tourist information that was very convenient.
The apartment is cozy, perfect for two travellers, we had no issues with the low roof (I'm 6 foot 3!) as some other reviews pointed out.
The location is absolutely incredible, really. It's smack bang in the center of the city, just a couple of minutes from Puerto del Sol. Yet it isn't noisy inside the apartment, even with the window open.
We'd definitely recommend this apartment, and would love to be back here if we're coming back to Madrid.