Amazing location - like literally in the very center of Madrid, you can walk to anywhere within 30 minutes. Clean big enough for 3 couples. Price-quality also very solid. Very quiet even though the street is very loud - you don't hear anything in the apartment even with windows open
A couple of caveats - although these are minor comments given price and location:
- ceiling is really low - I kept hitting my head even after a couple of days... this is mentioned in the description, but I certainly underestimated. bathroom is the most "dangerous" place
- lack of fresh air can make sleep a bit difficult. there are air conditioners, but they are in the halls and do not affect bedrooms if you want to sleep with closed doors