DREADFUL EXPERIENCE
Arrived in the evening and waited for Kristian's friend to let us in to the apartment as he had to go to Germany. Entered an apartment with unmade beds with used sheets, bags of garbage in dirty kitchen and a dirty bathroom smelling strongly of urine etc. Kristian's friend tried to calm us down by finding clean sheets and wiping down the bathroom to get us thru the night as it was late and he also had to get back to work.. He said he'd come the next afternoon to clean. He did and was upset and shocked how dirty it was--implying the place needed a thorough deep cleaning. In meantime, Kristian told us he could have canceled our reservation but didn't and instead asked the previous guest to leave it clean. He told Air B and B a cleaning service was coming to clean but instead it was a friend and a helper who was allergic to dust. His friend made the place habitable.

Unlike the description, the bedroom window faces a wall--Kristian told me it faces a courtyard. The living area windows and kitchen window face an elevator shaft with clothes lines and yes you can hear the neighbors rather loudly. The bathroom did not have a venting system as it was dirty and broken. The bathroom towels smelled of mildew.
Kristian came by several days later to apologize with a bottle of wine and said now everything is perfect. I said no, and you should have told us so we could have found another place to stay.

In all our travels we have never had such a horrible experience and it made for a very disappointing 8 day stay in Madrid.