Jose Luis's apartment is a convenient place for a short stay. It's adequate for a couple of days in Madrid, though not somewhere I would want to stay for a longer period of time.
The apartment is in a good location, convenient to public transportation, shopping, etc. Jose Luis was an excellent host and a very good communicator.
The apartment itself is basically one room and a bathroom. We did not use the stove so I can't comment on how well it works. The bed was only moderately comfortable, but the shower was excellent. Everything was very clean. The apartment has one window looking out onto an air shaft so it was pretty dark and airless. I believe it has an air conditioner which could be used in the summer. Given that we were mostly away from the apartment except to sleep, it was fine for our needs.