Ronny, My family and I had a wonderful time in Madrid. Thank you for your quick response and helpful tips. We were happy you had air conditioners. Everything was within walking distance. People were pleasant. We look forward to visiting Madrid again. Overall our stay was very good. There is truth to the squeaky bed and the sewer smell. However the sewer smell is throughout that whole area not just the apartment. it comes in waves.
It's always great to visit different countries and cultures. Embrace it for what it is.