Room is just what you see, no frills and no disappointment. A/C in Madrid is a life saver, summers can get very hot.
Apartment is on the top floor (4th) with no elevator, consider it if you have mobility issue. Otherwise no big deal at all.
Jose is a super nice guy, welcomed me warmly and helped me during the whole stay. He provided me a towel and I could use shampoos, soaps and toohpaste in the bathroom.
Location is just 10 mins walking away from a Metro station.
All in all, I would definetely go back there in the future.