The apartment is cozy, little and yet very comfortable, just steps away from the Levapies metro station, in a strategic location to acces Madrid's main attractions. The queen-size bed is actually a loft-bed situated on a mezzazine, quite spacious and easily accessible.
Although I spent there only two nights, I enjoyed the place and even Sergio's company over a beer: he was very helpful and down-to-earth. For those who are looking for tapas, the neighborhood is just plenty of bars.
I would definitively suggest this solution.